Transcript
ESR 0256 48 CLASS LOCOMOTIVE LOAD BOX PROCEDURES Version 1.0 Issued June 2010
Owner:
Chief Engineer Rolling Stock
Approved by:
Stephen White, Technical Specialist Rolling Stock Performance Standards, Rolling Stock Access Integrity
Authorised by:
Michael Uhlig, Manager, Rolling Stock Access Integrity
Disclaimer This document was prepared for use on the RailCorp Network only. RailCorp makes no warranties, express or implied, that compliance with the contents of this document shall be sufficient to ensure safe systems or work or operation. It is the document user’s sole responsibility to ensure that the copy of the document it is viewing is the current version of the document as in use by RailCorp. RailCorp accepts no liability whatsoever in relation to the use of this document by any party, and RailCorp excludes any liability which arises in any manner by the use of this document. Copyright The information in this document is protected by Copyright and no part of this document may be reproduced, altered, stored or transmitted by any person without the prior consent of RailCorp.
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Engineering Standard
Engineering Standard Rolling Stock
RailCorp Engineering Standard — Rolling Stock 48 class locomotive load box procedures
ESR 0256
Document control Revision
Date
Summary of change
(RSS 0256) 1.0
August 2007
Based on TRS 1377
(ESR 0256) 1.0
June 2010
Reformatted & renumbered
Summary of changes from previous version Summary of change
Section
NOTE – If the final document is small enough for the ‘Contents’ and ‘Document control’ to fit on one page remove the page break between the existing pages 2 and 3. HOWEVER if the ‘Document control’ page carries over to a second page separate pages must be used for ‘Contents’ and ‘Document control’
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RailCorp Engineering Standard — Rolling Stock 48 class locomotive load box procedures
ESR 0256
Contents 1 Scope..................................................................................................................................................4 2 General ...............................................................................................................................................4 3 Connection to load box. ...................................................................................................................4 3.1 With diesel engine shut down. ..................................................................................................4 4 Start up runs. .....................................................................................................................................5 4.1 4801-45 .....................................................................................................................................5 4.2 4846-48165 ...............................................................................................................................5 5 Load testing “C”................................................................................................................................6 5.1 Quarter load test. ......................................................................................................................6 5.2 Engine speeds. .........................................................................................................................6 5.3 Voltage regulator adjustment. ...................................................................................................7 5.4 Engine governor timing. ............................................................................................................7 5.5 Half load test. ............................................................................................................................8 5.6 Three quarter load test..............................................................................................................8 5.7 Engine adjustments...................................................................................................................8 6 Full load test “D”. ..............................................................................................................................9 6.1 Locomotives 4801 - 4845..........................................................................................................9 6.2 Locomotives 4846 - 48165......................................................................................................10 7 48 Class locomotive horsepower tables.......................................................................................11 Table 1. 800 amps to 1100 amps........................................................................................................11 Table 1. 1200 amps to 1500 amps......................................................................................................12 Table 2. Air inlet temperature Horsepower correction. ..................................................................13 Table 3. Fuel oil temperature Horsepower correction .....................................................................14 Table 4. Fuel oil temperature correction for fuel oil specific gravity .............................................15 Table 5. Fuel oil specific gravity horsepower correction. ................................................................16 8 References. ......................................................................................................................................17 8.1 RailCorp standards .................................................................................................................17 8.2 Alco locomotive maintenance manual TP-508 .......................................................................17 8.3 48 Class Comeng instruction manual .....................................................................................17 Load test data sheet.............................................................................................................................18
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RailCorp Engineering Standard — Rolling Stock 48 class locomotive load box procedures
1
ESR 0256
Scope This standard/instruction sets out the procedures to be adopted when 48 class locomotives are to be load box tested.
2
General 48 class locomotives are required to be load tested after component changeout (CCO) and after a scheduled "A" Inspection. They may also be required to be load tested at other times for the purpose of troubleshooting. The initial connections and safety considerations are the same regardless of the purpose for the load test. The following is the testing procedure for load box testing of 48 class locomotives after component changeout. sections 3, 4, 5 (5.2, 5.3, 5.4, 5.7). Sections 6.1 and 6.2 are appropriate after an "A" Inspection or for testing for any purpose.
3
Connection to load box. Note: This connection procedure may vary slightly for different locations. The procedure below is general and may require some changes depending on load box console control and indications, and what system of earth fault detection is used. Some locations have their own procedures for load box connection and in these cases should replace the following section (eg., Lithgow Maintenance Centre refer to LMC-WI-006).
3.1
With diesel engine shut down. 1. Disconnect all the GA2 (main negative) cables from the main generator. NB: Do not remove the 36 wire from the GA2 terminal that is connected to the ground relay. 2. Disconnect all the GA1 (main positive) cables from the main generator. 3. Locate the GA1 cable connected to CK1 contactor and re-connect it to the GA1 terminal on the main generator. 4. Disconnect A6 and 48 cables from CK1 contactor. NB: All disconnected cables are to be individually protected and insulated by the use of suitable sleeving. 5. Connect the positive cables from the load box to the GA1 terminal on the main generator. 6. Connect the negative cables from the load box to the GA2 terminal on the main generator. 7. Isolate the control air supply at the control air supply cock. NB: 4801-4885, control air reservoir is located in the short end. 4886-48165, control air reservoir is located on the fan room wall in the engine room. 8. Operate the drain cock and check the air gauge to ensure the reservoir has drained. 9. Manually operate P1 power contactor magnet valve to ensure that it does not pick up and close. 10.Centre the reverser.
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RailCorp Engineering Standard — Rolling Stock 48 class locomotive load box procedures
ESR 0256
11.Connect a 0-1000 volt DC voltmeter (Meter 1) between a 50 wire and a 4 wire. 12.4886-48165 only. Connect a 1 amp DC ammeter in series with the battery field (Meter 2) between 25 and 25A wires on the generator field contactor (GF) interlock and insulate the interlock using suitable insulation material. 13.Arrange to have thermocouples fitted and connect them to the temperature recording equipment. 14.Fit a calibrated pressure gauge (minimum 0-1000 kPa) to the plugged fitting or sampling valve on the pipe between the oil relief valve and oil cooler to read the oil relief valve pressure.
4
Start up runs. 1. Ensure all staff are clear of live equipment and moving parts before starting the diesel engine. Ensure the hand brake is 'ON' and wheels are chocked. Ensure the compressor is unloaded. 2. Close the battery switch. The Auxiliary Field Circuit Breaker is to remain in the 'OFF' position. Switch on all the other circuit breakers. Place engine control switch (ECS) in idle, reverser handle in neutral and throttle handle in idle. 3. Press the 'START' button. Ensure that the diesel engine starts correctly. 4. Ensure the diesel engine will shutdown using the stop button. 5. Run the engine at 'NO LOAD' for two (2) minutes. Shut engine down and conduct a mechanical inspection of the crankcase. 6. Run the engine at 'NO LOAD' for five (5) minutes. Shut engine down and conduct a mechanical inspection of the crankcase. 7. Run the engine at 'NO LOAD' for ten (10) minutes. Check engine cooling fan operation.
4.1
4801-45 • With the diesel engine running and temperature below automatic fan operation, turn the fan control rotary switch from the auto position to the medium position. • Ensure that the fan operates at medium speed. • Turn the rotary switch from the medium position to the full position. • Ensure that the fan operates at full speed. • Return the switch to the auto position.
4.2
4846-48165 • With the diesel engine running and temperature below automatic fan operation, break the lead seal on the fan control emergency switch and place switch in the emergency position • Ensure that the fan runs at full speed. • Return the switch to the normal position and reseal. Shut the diesel engine down and do a mechanical inspection of crankcase.
8. With the diesel engine running in idle, check the fuel oil, lubricating oil and water pipe work for leaks. Also check the fuel oil for aeration. Check lubricating oil pressure (approximately 770-795 kPa (110-115 psi) at this point of engine operation). NB: The oil pressure for steel capped pistons should be approximately 520-550 kPa (75-80 psi).
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ESR 0256
9. Load compressor. Ensure air compressor governor is operating correctly. Operation should be within the range of 750-850 kPa (110-123 psi). Adjustments to be made as per Alco Maintenance Instruction MI-1053 in Alco Locomotive Maintenance Manual TP-508. 10. Switch Auxiliary Field Circuit Breaker 'ON' and observe charge rate on BATTERY AMMETER. The charging current should be high initially and then slowly decrease to a lower current reading. Voltage output reading on 'METER 1' should be approximately 74 volts. 11. Check that fuel oil relief valve is operating at 485-520 kPa (70-75 psi) and that the fuel oil regulating valve is operating at 275-310 kPa (40-50 psi). Adjust if necessary to Alco MI-1045 in Alco Locomotive Maintenance Manual TP-508.
5
Load testing “C”
5.1
Quarter load test. 1. Main Generator brushes are to have been bedded in prior to quarter load test. Refer to ESR 0272. 2. With the diesel engine running in idle, switch generator field (GFCO) to on. Advance the throttle handle to fourth (4) notch and lower the load box movable plates to obtain a current of approximately 750 amps (voltage should be approximately 300 volts). 3. Run the diesel engine under quarter load for half (1/2) an hour if a 5 year component changeout, and for one (1) hour if a 10 year component changeout. 4. Ensure that the temperature switches operate at the correct temperatures and that the engine cooling fan is operating. (refer to ESR 0270). 5. Shut down the diesel engine and do a mechanical inspection of the crankcase.
5.2
Engine speeds. With diesel engine running under 'NO LOAD' conditions. 1. Advance the throttle handle to notch six (6). – Engine speed should be 860 (+15/-0) rpm. (Camshaft 430 (+7/-0) rpm). – If required, adjust basic speed setting nut in engine governor to obtain the correct rpm. (run up to increase rpm). 2. Advance to notch eight (8). – Engine speed should be 1025 (+15/-0) rpm. (Camshaft 512 (+7/-0) rpm). – Adjust the "D" stop screw on top of the "D" solenoid in engine governor. (run up to increase rpm). 3. Return to notch seven (7). – Engine speed should be 930 (+15/-0) rpm. (Camshaft 465 (+7/-0) rpm). – Adjust the "A" stop screw on top of the "A" solenoid. (run down to increase rpm). 4. Return to notch four (4). – Engine speed should be 675 (+15/-0) rpm. (Camshaft 337 (+7/-0) rpm). – Adjust the "B" stop screw on top of the "B" solenoid. (run down to increase rpm). 5. Return to idle. – Engine speed should be 375 (+15/-0) rpm. (Camshaft 187 (+7/-0) rpm). – Adjust the "C" stop screw on top of the "C" solenoid. (run down to increase rpm). 6. Advance to notch one (1) then notch two (2), then notch three (3), and then notch five (5). The respective engine speeds should be
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ESR 0256
– Notch 1
375 (+15/-0) rpm. (Camshaft 187 (+7/-0) rpm),
– Notch 2
470 (+15/-0) rpm. (Camshaft 235 (+7/-0) rpm),
– Notch 3
580 (+15/-0) rpm. (Camshaft 290 (+7/-0) rpm),
– Notch 5
765 (+15/-0) rpm. (Camshaft 382 (+7/-0) rpm).
– Adjustment of these speeds is obtained by adjusting the other basic speed settings of notches 6, 8, 7, 4, and idle within their tolerances. 7. Ensure overspeed operates for engine speed in the range 1135 - 1175 rpm. (Camshaft 567 - 587 rpm).
5.3
Notch
Engine Speed
Camshaft Speed
1st
375
187
2nd
470
235
3rd
580
290
4th
675
337
5th
765
382
6th
860
430
7th
930
465
8th
1025
512
Overspeed
1135 / 1175
567 / 587
Voltage regulator adjustment. 1. Ensure the voltage regulator has been in operation for at least thirty (30) minutes and that minimum current demand conditions exists. (ie., battery charging current has settled to a low value and auxiliaries such as cab heaters, fans and hotplates, etc are all switched OFF). 2. Ensure the value on METER 1 (voltmeter) is 74 (+0/-2) volts in idle and in notch eight (8). Adjust the voltage regulator accordingly to obtain the correct voltage setting.
5.4
Engine governor timing. Ensure that the load regulator timing is in accordance with ESR 0257.
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4801 - 4845
4846 - 48165
maximum to minimum
9 - 12 seconds
15 - 18 seconds
minimum to maximum
10 - 14 seconds
16 - 20 seconds
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5.5
ESR 0256
Half load test. 1. Load the diesel engine to half load by running the diesel engine in notch six (6) with a current of approximately 1100 amps (voltage should be approximately 400 volts). 2. Run the diesel engine under half load for half (1/2) an hour if a 5 year component changeout, and for one (1) hour if a 10 year component changeout. 3. Shut down the diesel engine and do a mechanical inspection of the crankcase.
5.6
Three quarter load test. 1. Load the diesel engine to three quarter load by running the diesel engine in notch seven (7) with a current of approximately 1100 amps (voltage should be approximately 500 volts). 2. Run the diesel engine under three quarter load for one (1) an hour if a 5 year component changeout, and for two (2) hours if a 10 year component changeout. 3. Shut down the diesel engine and do a mechanical inspection of the crankcase.
5.7
Engine adjustments. 1. Check the diesel engine timing and adjust the inlet and exhaust valve clearances as required. Refer to Alco Maintenance Instruction MI-11034 in the 48 Class Comeng Instruction Manual. 2. Check the condition of the main generator, auxiliary generator and exciter. 3. Check brushes and commutator for signs of overheating. 4. Adjust the fuel pump timing as necessary. Refer to Alco Maintenance Instruction MI11068C in the 48 Class Alco Instruction Manual. 5. Lift the load box movable plates and check that the open circuit voltage and battery field current are as below:
NB:
4801 - 4845
1000 – 1040 volts
4846 - 48165
930 – 950 volts
Decreasing the resistance increases the open circuit voltage.
6. With the battery field current, slight variations may exist in the intermediate notches but eighth (8) notch current should be as stated 0.42 amps. Battery Field Current Notch
Amps
1st
0.145
2nd
0.235
3rd
0.3
4th
0.34
5th
0.375
6th
0.42
7th
0.42
8th
0.42
7. If adjustments have been made, re-check the open circuit voltage.
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RailCorp Engineering Standard — Rolling Stock 48 class locomotive load box procedures
6
Full load test “D”.
6.1
Locomotives 4801 - 4845.
ESR 0256
1. Load the diesel engine to full load by running the diesel engine in notch eight (8) with a current of approximately 1100 amps (voltage should be approximately 600 volts). 2. Run the diesel engine under full load for one (1) hour if a 5 year component changeout, and for two (2) hours if a 10 year component changeout. 3. Ensure the oil relief valve pressure is 830-860 kPa (120-125 psi) and that the oil regulating valve pressure is 725-760 kPa (105-110 psi). If incorrect adjust according to RSS 0250. NB: Pressures above are for steel capped pistons. For aluminium pistons the following pressures apply, relief valve 620-655 kPa (90-95 psi), and regulating valve 485-520 kPa (70-75 psi). 4. Ensure that the engine is not significantly over horsepowered. Ensure that no head exhaust temperature is greater than 580°C for a 320 turbocharger or 520°C for a Napier or BBC turbocharger and that there is no more than 100°C difference between any two (2) heads. Correct any faults. 5. Lower the plates to increase current to 1600 amps. Voltage should be 395 ± 30 volts and load regulator should be in the maximum field position. NB: If the voltage is not within this range return the engine to idle and open GFCO (switch OFF). Adjustment of EFR resistor is required. – If voltage is high, increase resistance 42 - 42B on EFR. – If voltage is low, decrease resistance 42 - 42B on EFR. 6. Raise plates to lower current to 900 amps. Voltage should be 735 ± 20 volts NB: If the voltage is not within this range return the engine to idle and open GFCO (switch OFF). Adjustment of EFR resistor is required. – If voltage is high, decrease resistance 42B - 61 on EFR. – If voltage is low, increase resistance 42B - 61 on EFR. 7. Reduce the current to 800 amps. Take the voltage reading and enter the value on the test data sheet. lower plates, increasing current in 100 amp steps, continuing to enter the voltage readings until a current of 1500 amps is obtained. NB: Ensure that full fan is on and compressor is unloaded while taking measurements. 8. Convert voltages for the different plate positions using Table 1 to measure horsepower. Linearly estimate between table values. Horsepower total divided by eight (8) gives average horsepower. 9. Calculate horsepower correction factors using the following tables: T able 2 (Air Inlet Temperature Horsepower Correction) Table 3
(Fuel Oil Temperature Horsepower Correction)
Table 4
(Fuel Oil Temperature Correction for Fuel Oil Specific Gravity)
Table 5
(Fuel Oil Specific Gravity Correction).
10.Calculate the correct horsepower as per Load Test Data Sheet. If correct horsepower is not in the range of 910 - 930 HP, then the fuel racks will need to be adjusted to bring the corrected horsepower within this range, ensuring that all other mechanical and electrical adjustments are correct.
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ESR 0256
11.Complete the full load test. 12.Disconnect the locomotive from the load box. Disconnect all test equipment on the locomotive and ensure all previous locomotive connections are restored. 13.Replace all locomotive covers.
6.2
Locomotives 4846 - 48165. 1. Load the diesel engine to full load by running the diesel engine in notch eight (8) with a current of approximately 1100 amps (voltage should be approximately 600 volts). 2. Run the diesel engine under full load for one (1) hour if a 5 year component changeout, and for two (2) hours if a 10 year component changeout. 3. Ensure the oil relief valve pressure is 830-860 kPa (120-125 psi) and that the oil regulating valve pressure is 725-760 kPa (105-110 psi). If incorrect adjust according to RSS 0250. NB: Pressures above are for steel capped pistons. For aluminium pistons the following pressures apply, relief valve 620-655 kPa (90-95 psi), and regulating valve 485-520 kPa (70-75 psi). 4. Ensure that the engine is not significantly over horsepowered. Ensure that no head exhaust temperature is greater than 580°C for a 320 turbocharger or 520°C for a Napier or BBC turbocharger and that there is no more than 100°C difference between any two (2) heads. Correct any faults. 5. Lower the plates to increase current to 1600 amps. Voltage should be 395 ± 30 volts and the load regulator should be in the maximum field position. NB: If the voltage is not within this range return the engine to idle and open GFCO (switch OFF). Adjustment of EFR2 resistor is required. – If voltage is high, decrease EFR2 resistance. – If voltage is low, increase EFR2 resistance. 6. Reduce the current to 800 amps. Take the voltage reading and enter value on the test data sheet. Lower the plates, increasing current in 100 amp steps, continuing to enter the voltage readings until a current of 1500 amps is obtained. NB: Ensure that full fan is operating and the compressor is unloaded while taking measurements. 7. Convert voltages for the different plate positions using Table 1 to measure horsepower. Linearly estimate between table values. Horsepower total divided by eight (8) gives average horsepower. 8. Calculate horsepower correction factors using the following tables: Table 2 (Air Inlet Temperature horsepower Correction) Table 3
(Fuel Oil Temperature Horsepower Correction)
Table 4
(Fuel Oil Temperature Correction for Fuel Oil Specific Gravity)
Table 5
(Fuel Oil Specific Gravity Correction).
9. Calculate the correct horsepower as per Load Test Data Sheet. If correct horsepower is not in the range of 930 - 950 HP, then the fuel racks will need to be adjusted to bring the corrected horsepower within this range, ensuring that all other mechanical and electrical adjustments are correct. 10.Complete the full load test. 11.Disconnect the locomotive from the load box. Disconnect all test equipment on the locomotive and ensure all previous locomotive connections are restored. 12.Replace all locomotive covers.
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RailCorp Engineering Standard — Rolling Stock 48 class locomotive load box procedures
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ESR 0256
48 Class locomotive horsepower tables Table 1. 800 amps to 1100 amps 800 AMPS
900 AMPS
1000 AMPS
1100 AMPS
VOLTS
HP
VOLTS
HP
VOLTS
HP
VOLTS
HP
750
846
650
826
570
806
530
827
755
852
655
831
575
812
535
835
760
859
660
837
580
820
540
842
765
865
665
843
585
826
545
850
770
869
670
850
590
835
550
857
775
875
675
857
595
843
555
866
780
880
680
864
600
848
560
875
785
886
685
868
605
855
565
884
790
893
690
876
610
865
570
890
795
899
695
883
615
870
575
896
800
904
700
889
620
877
580
906
805
910
705
895
625
885
585
914
810
916
710
902
630
891
590
921
815
922
715
907
635
898
595
930
820
927
720
914
640
905
600
936
825
932
725
920
645
912
605
945
830
938
730
925
650
920
610
953
835
943
735
932
655
927
615
961
840
948
740
939
660
933
620
969
845
955
745
945
665
940
625
977
850
960
750
953
670
949
630
983
855
966
755
958
675
955
635
992
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RailCorp Engineering Standard — Rolling Stock 48 class locomotive load box procedures
ESR 0256
Table 1. 1200 amps to 1500 amps 1200 AMPS
1300 AMPS
1400 AMPS
1500 AMPS
VOLTS
HP
VOLTS
HP
VOLTS
HP
VOLTS
HP
480
823
440
822
390
792
360
785
485
831
445
833
395
800
365
797
490
841
450
842
400
811
370
808
495
849
455
850
405
824
375
820
500
857
460
860
410
833
380
833
505
865
465
870
415
844
385
844
510
873
470
880
420
853
390
853
515
882
475
890
425
864
395
863
520
892
480
897
430
872
400
875
525
900
485
907
435
884
405
886
530
910
490
917
440
893
410
896
535
916
495
925
445
903
415
906
540
925
500
935
450
913
420
918
545
934
505
944
455
923
425
930
550
941
510
953
460
932
430
940
555
951
515
964
465
945
435
952
560
960
520
974
470
954
440
962
565
970
525
982
475
965
445
973
570
978
530
990
480
975
450
985
575
985
535
1000
485
985
455
995
580
996
540
1010
490
996
460
1008
585
1004
545
1017
495
1005
465
1018
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RailCorp Engineering Standard — Rolling Stock 48 class locomotive load box procedures
ESR 0256
Table 2. Air inlet temperature Horsepower correction. °C
H.P. correction
°F
°C
HP. Correction
°F
0
-25.2
32.0
25
+17.0
77.0
1
-23.6
33.8
26
+18.8
78.8
2
-22.0
35.6
27
+20.6
80.6
3
-20.3
37.4
28
+22.4
82.4
4
-18.7
39.2
29
+24.2
84.2
5
-17.1
41.0
30
+26.0
86.0
6
-15.5
42.8
31
+27.8
87.8
7
-13.9
44.6
32
+29.6
89.6
8
-12.2
46.4
33
+31.4
91.4
9
-10.6
48.2
34
+33.2
93.2
10
-9.0
50.0
35
+35.0
95.0
11
-7.4
51.8
36
+36.8
96.8
12
-5.8
53.6
37
+38.6
98.6
13
-4.1
55.4
38
+40.4
100.4
14
-2.5
57.2
39
+42.2
102.2
15
-0.9
59.0
40
+44.0
104.0
16
+0.8
60.8
41
+45.8
105.8
17
+2.6
62.6
42
+47.6
107.6
18
+4.4
64.4
43
+49.4
109.4
19
+6.2
66.2
44
+51.2
111.2
20
+8.0
68.0
45
+53.0
113.0
21
+9.8
69.8
46
+54.8
114.8
22
+11.6
71.6
47
+56.6
116.6
23
+13.4
73.4
48
+58.4
118.4
24
+15.2
75.2
49
+60.2
120.2
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RailCorp Engineering Standard — Rolling Stock 48 class locomotive load box procedures
ESR 0256
Table 3. Fuel oil temperature Horsepower correction °C
HP. Correction
°F
°C
HP. Correction
°F
0
-13.0
32.0
25
+7.7
77.0
1
-12.1
33.8
26
+8.5
78.8
2
-11.2
35.6
27
+9.3
80.6
3
-10.3
37.4
28
+10.2
82.4
4
-9.4
39.2
29
+11.1
84.2
5
-8.6
41.0
30
+12.0
86.0
6
-7.9
42.8
31
+12.9
87.8
7
-7.2
44.6
32
+13.8
89.6
8
-6.4
46.4
33
+14.7
91.4
9
-5.7
48.2
34
+15.6
93.2
10
-5.0
50.0
35
+16.5
95.0
11
-4.1
51.8
36
+17.4
96.8
12
-3.2
53.6
37
+18.3
98.6
13
-2.3
55.4
38
+19.2
100.4
14
-1.4
57.2
39
+20.1
102.2
15
-0.5
59.0
40
+21.0
104.0
16
+0.4
60.8
41
+21.9
105.8
17
+1.2
62.6
42
+22.8
107.6
18
+2.0
64.4
43
+23.7
109.4
19
+2.8
66.2
44
+24.6
111.2
20
+3.6
68.0
45
+25.5
113.0
21
+4.4
69.8
46
+26.4
114.8
22
+5.2
71.6
47
+27.3
116.6
23
+6.0
73.4
48
+28.2
118.4
24
+6.9
75.2
49
+29.1
120.2
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Page 14 of 18 Version 1.0
RailCorp Engineering Standard — Rolling Stock 48 class locomotive load box procedures
ESR 0256
Table 4. Fuel oil temperature correction for fuel oil specific gravity °C
Specific gravity correction
°F
°C
Specific gravity correction
°F
0
-0.0098
32.0
18
+0.0015
64.4
1
-0.0092
33.8
19
+0.0022
66.2
2
-0.0086
35.6
20
+0.0028
68.0
3
-0.0079
37.4
21
+0.0034
69.8
4
-0.0073
39.2
22
+0.0041
71.6
5
-0.0067
41.0
23
+0.0047
73.4
6
-0.0060
42.8
24
+0.0053
75.2
7
-0.0054
44.6
25
+0.0060
77.0
8
-0.0048
46.4
26
+0.0066
78.8
9
-0.0041
48.2
27
+0.0072
80.6
10
-0.0035
50.0
28
+0.0078
82.4
11
-0.0029
51.8
29
+0.0085
84.2
12
-0.0022
53.6
30
+0.0091
86.0
13
-0.0016
55.4
31
+0.0097
87.8
14
-0.0010
57.2
32
+0.0104
89.6
15
-0.0004
59.0
33
+0.0110
91.4
16
+0.0003
60.8
34
+0.0116
93.2
17
+0.0009
62.6
35
+0.0123
95.0
Temperature Correction Coefficient = 0.00063/°C
© Rail Corporation Issued June 2010
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Page 15 of 18 Version 1.0
RailCorp Engineering Standard — Rolling Stock 48 class locomotive load box procedures
ESR 0256
Table 5. Fuel oil specific gravity horsepower correction. Specific gravity
HP correction
Specific gravity
HP correction
0.805
+30.5
0.836
+6.9
0.806
+29.8
0.837
+6.1
0.807
+29.0
0.838
+5.4
0.808
+28.3
0.839
+4.6
0.809
+27.5
0.840
+3.8
0.810
+26.7
0.841
+3.1
0.811
+26.0
0.842
+2.3
0.812
+25.2
0.843
+1.5
0.813
+24.5
0.844
+0.8
0.814
+23.7
0.845
0.0
0.815
+22.9
0.846
-0.8
0.816
+22.2
0.847
-1.5
0.817
+21.4
0.848
-2.3
0.818
+20.6
0.849
-3.1
0.819
+19.9
0.850
-3.8
0.820
+19.1
0.851
-4.6
0.821
+18.4
0.852
-5.4
0.822
+17.6
0.853
-6.1
0.823
+16.8
0.854
-6.9
0.824
+16.1
0.855
-7.6
0.825
+15.3
0.856
-8.4
0.826
+14.5
0.857
-9.2
0.827
+13.8
0.858
-9.9
0.828
+13.0
0.859
-10.7
0.829
+12.2
0.860
-11.5
0.830
+11.5
0.861
-12.2
0.831
+10.7
0.862
-13.0
0.832
+9.9
0.863
-13.8
0.833
+9.2
0.864
-14.5
0.834
+8.4
0.865
-15.3
0.835
+7.6
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Page 16 of 18 Version 1.0
RailCorp Engineering Standard — Rolling Stock 48 class locomotive load box procedures
8
References.
8.1
RailCorp standards
ESR 0256
ESR 0250 Alco oil regulating & relief switches ESR 0257 48 class load control regulator ESR 0270 Setting of engine temperature switches ESR 0272 Brush bedding & commutator dressing
8.2
Alco locomotive maintenance manual TP-508 MI-1045 MI 1053
8.3
48 Class Comeng instruction manual MI 11034 MI 11068
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Page 17 of 18 Version 1.0
RailCorp Engineering Standard — Rolling Stock 48 class locomotive load box procedures
ESR 0256
Load test data sheet Locomotive Number Depot Reason For Load Test: Auxiliary Generator Voltage: Idle: volts. Open Circuit Voltage: volts. Battery Field Current (8th notch) (4846 - 48165 only): Load Regulator Timing: Engine Speeds Notch 6th 8th 7th 4th 1st 2nd 3rd 5th Idle O/Speed
Max to Min Min to Max
RPM RPM RPM RPM RPM RPM RPM RPM RPM RPM
volts.
amps .
kPa/PSI kPa/PSI; 8th notch: kPa/PSI. Fuel Rack Setting (8th notch): °C/°F
Horsepower Correction Calculations Water Temperature °C/°F Fuel Temperature °C/°F Air Inlet Temperature °C/°F Fuel Specific Gravity + correction Corrected Fuel Specific Gravity
© Rail Corporation Issued June 2010
8th Notch:
secs. secs. Engine Exhaust Temperatures (8th notch, loaded for 30 minutes) 1 °C/°F 2 °C/°F 3 °C/°F 4 °C/°F 5 °C/°F 6 °C/°F
Lube Oil Pressure: Fuel Oil Pressure: Idle: Turbo Boost Pressure: Water Temperature (8th notch):
Current Voltage 800 900 1000 1100 1200 1300 1400 1500 Total Horsepower Av. Horsepower
Date
Horsepower
Corrected Horsepower
kPa/PSI
Horsepower Correction Horsepower Correction
HP HP
Horsepower Correction Total Horsepower Correction
HP HP
=
Average Horsepower
+
Total Horsepower Correction
+ Corrected Horsepower
=
Trades Persons Signatures:
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