Transcript
2005 REBA SL/RACE/TEAM SERVICE GUIDE For exploded diagram and part number information, refer to the Spare Parts Catalog available on our website at www.rockshox.com. Information contained in this publication is subject to change at anytime without prior notice. For the latest technical information, visit our website at www.rockshox.com. Names used in this manual may be trademarks or registered trademarks of others. © SRAM Corporation • August 2004
PN 95.4309.887.000, Rev. A
2005 Reba SL/Race/Team Service Guide • • • •
Perform service every 100 hours of riding (less depending on riding conditions and riding style). Regular maintenance ensures your fork performs as it should. For bushing removal and installation, please reference the Bushing Service Guide. Right side equals rider’s right; left side equals rider’s left.
G E T T I N G S TA R T E D 1. Remove fork from bicycle. 2. Spray entire fork with isopropyl alcohol and wipe all dirt and mud from fork. Clean around dust seals and upper tubes. 3. Lay tools out on work bench, and create a clean work area for internals service. 4. Place oil pan under fork on floor.
TOOLS • • • • • • • • • •
Safety Glasses Clean Rags Oil Pan or Bucket Bicycle Stand and Clean Work Table/Area 24mm 6-point Socket Plastic-Faced Mallet Snap Ring Pliers (internal and external) Shock Pump 2mm, 2.5mm, 3mm, 5mm Hex Wrench Long and Short Plastic or Wood Dowel, 3/4" diameter (non-metallic)
• • • • • •
Torque Wrench Sharp Pick/Dental Pick Oil Mixing Syringe and Measuring cup Isopropyl Alcohol/Spray Bottle 5wt and 15wt Suspension Oil Isopropyl Alcohol (in Spray Bottle)
L O W E R L E G / I N T E R N A L S R E M O VA L 1. Remove both air valve cover caps from the left side of the fork. Depress positive schrader valve (upper) FIRST and remove all air from air spring chamber. Depress negative schrader valve (lower) SECOND and remove all air pressure.
1a
1b
2. Gently pull external rebound adjuster knob and remove from right shaft bolt (11.4308.846.000, 05 External Rebound Adjuster Knob, Short).
2
1c
1d
2
© SRAM Corporation • 2005 REBA SL/RACE/TEAM SERVICE GUIDE
2005 Reba SL/Race/Team Service Guide 3. Using a 5mm hex wrench, loosen both shaft bolts 3 to 4 turns. Using a 10mm open end wrench, loosen the DualAir shaft bolt. Unthread by hand so bolt is unthreaded just past the end of the threaded shaft end.
3a
3b
4. With the hex wrench in shaft bolt, tap bolt free with plastic mallet. Using your fingers, remove shaft bolt completely. DualAir side: Place 10mm socket tool onto DualAir nut; tap socket with plastic mallet until shaft breaks free from lower leg casting. Using your fingers, remove shaft bolt and threaded shaft nut from both threaded shaft ends.
4a
4b
5. Firmly pull the lower leg assembly down by holding each leg or the brake arch. Spray isopropyl alcohol into each leg. Wrap a clean rag around a long dowel and clean inside of lower legs.
5
IMPORTANT! DO MAGNESIUM.
NOT STRIKE OR TAP THE BRAKE ARCH WITH A MALLET.
THIS
DAMAGES THE
6. Spray isopropyl alcohol into each upper tube; wipe clean. Wrap a clean rag around a long dowel and clean the inside of each lower leg.
6a
6b
Reba Dual Air: Skip to Step 35.
AIR SPRING SERVICE A I R U - T U R N S P R I N G A S S E M B LY Removal (Part kit required: 11.4309.010.000, Reba U-Turn Air Spring O-Ring Service Kit) 7. Adjust travel setting to 115mm (full travel). Ensure all air pressure is removed from positive and negative air chambers.
PN 95.4309.887.000, REV. A
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2005 Reba SL/Race/Team Service Guide 8. Using a sharp pick or screwdriver, push external retaining clip from above U-Turn knob (fig 8a). Remove adjuster knob. Remove each detent ball bearing and spring from top cap (fig 8c) by using a magnet.
8a
8b
8c
IMPORTANT! IN THE EVENT THE AIR U-TURN (24MM) TOP CAP MUST BE REMOVED FROM UPPER TUBE/CROWN, USE A 24MM SOCKET WRENCH TO BEFORE INSTALLATION, ADD A FEW REMOVE. DROPS OF BLUE THREADLOCK TO THE TOP CAP
THREADS. 9. Turn Air U-Turn travel adjust shaft, or bottom of air shaft, CLOCKWISE to unthread air spring assembly from Air U-Turn top cap. Top cap should be tight inside crown/upper tube. Pull down on Air UTurn shaft to remove entire spring assembly from bottom of upper tube.
9a
9b
AIR U-TURN SPRING ASSEMBLY INCLUDES: Spring travel adjuster assembly Air spring tube Positive/negative air spring assembly
D I S A S S E M B LY & S E RV I C E : U - T U R N A I R P I S TO N / S H A F T A S S E M B LY Disassembly and Service should be performed on a clean work surface.
10
10. Remove Teflon washer from inside of top cap by pushing down with a pick or flat-head screwdriver. The washer exits the bottom of upper tube. NOTE: GREASE
MAY CAUSE
A SHARP PICK TO DISLODGE.
TEFLON
WASHER TO REMAIN IN UNDERSIDE OF TOP CAP.
USE
11. Using external snap ring pliers, remove small external retaining ring (fig 11a). This secures air tube guide plate. Remove guide plate (fig 11b).
11a
11b
12. Using a flat-head screwdriver, push down on seal head (position screwdriver head against step, away from shaft) to free the retaining ring from seal head (fig 12a). You may need to deflate positive air to help release seal head. After the seal-head slides into air tube, use snap ring pliers to remove seal-head retaining ring from air tube (fig 12b).
12a
12b
IMPORTANT! DO NOT SCRATCH AIR SHAFT. A SCRATCH CAUSES AIR LEAK.
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© SRAM Corporation • 2005 REBA SL/RACE/TEAM SERVICE GUIDE
2005 Reba SL/Race/Team Service Guide 13. Pull air shaft, negative air seal head and positive air piston assemblies out of air tube (fig 13a). Slide and remove aluminum seal head from air shaft (fig 13b).
13a
13b
14. Use external snap ring pliers to remove positive air piston retaining ring (fig 14a). Remove positive air piston (fig 14b).
14a
14b
15. Pinch the small o-ring on air
IMPORTANT! DO NOT SCRATCH O-RING REMOVING O-RINGS. DAMAGE WILL CAUSE
GROOVES WHEN
PERMANENT AIR LEAK.
15a
15b
15c
15d
16. Pinch external air piston o-ring; remove and replace (fig 1). Use a sharp pick to remove seal head external and internal o-rings (fig 2). Coat new o-ring with suspension oil (5, 10 or 15wt) (fig 3).
16a
16b
16c
17a
17b
piston shaft groove; remove and replace (figs 15a & 15b). Coat new o-ring with suspension oil (5, 10 or 15wt) (figs 15c & 15d).
17. Place the air piston back onto shaft end and secure with NEW 10mm external retaining ring. IMPORTANT! THE 10MM
EXTERNAL RETAINING RING MAY BECOME
DAMAGED IF STRETCHED OPEN TOO FAR DURING ASSEMBLY.
ENSURE
THE RETAINING RING IS FULLY SEATED INTO SHAFT GROOVE AND NOT LOOSE.
PINCH
RETAINING RING TIGHT WITH PLIERS IF NECESSARY.
PN 95.4309.887.000, REV. A
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2005 Reba SL/Race/Team Service Guide D I S A S S E M B LY & S E RV I C E : T R AV E L A D J U S T E R / C H O K E A S S E M B LY Disassembly and Service should be performed on a clean work surface. 18. Holding air tube, place upper choke assembly end on flat surface. Firmly press tube down on flat surface to push choke assembly through tube. Press firm to break the seal. Choke assembly will feel tight inside tube.
19. Use a nonmetallic rod (a large magic marker, or wood/plastic dowel also works well) to continue to push the assembly through and out of air tube. Remove assembly completely from air tube (figs 19a to 19c). NOTE: POUNDING
THE
ROD
ON
THE
18a
18b
19b
19c
FLAT
SURFACE MAY BE NECESSARY TO FORCE THE ORING OUT
(FIG 19C).
IMPORTANT!
A
NONMETALIC
DOWEL/ROD
19a
ENSURES THAT THE INSIDE OF THE AIR TUBE IS NOT SCRATCHED.
20. Spray isopropyl alcohol inside of air tube. Wrap clean rag around end of dowel and push through tube to clean inside tube surface.
21. Remove external choke retaining ring from travel adjustment shaft (fig 21a). Remove choke piston and choke/shaft washer (fig 21b).
20
21a 21b
22. Remove external choke o-ring. Replace o-ring and apply suspension oil (not grease) to new o-ring.
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22a
22b
© SRAM Corporation • 2005 REBA SL/RACE/TEAM SERVICE GUIDE
2005 Reba SL/Race/Team Service Guide 23. Remove the upper seal-head from adjuster shaft (fig 23a). Remove upper seal head outer and inner o-rings. Use a sharp flat-head screwdriver to remove inner o-ring retaining ring (figs 23b & 23c). Replace both o-rings and coat new o-ring with 5, 10 or 15wt suspension oil. Reinstall inner o-ring retaining ring with small, sharp flat-head screwdriver.
23a
23b
23c
23d
23e
23f
24. Re-install the upper seal head onto travel adjustment shaft (fig 24a). Apply oil to adjuster shaft, and onto inner seal head o-ring (fig 24b). Install the choke piston and secure with new 10mm external retaining ring (fig 24c).
24a
24b
24c
25. Apply a few drops of RockShox 15wt suspension oil to the exposed shaft in between upper seal head and choke piston (fig 25a). Apply oil to both piston o-rings (figs 25b and c).
25a
25b
25c
26c
26d
I N S TA L L AT I O N 26. Insert the upper choke assembly into the open end of air spring tube, schrader valve end first (fig 26a-c). Using a long plastic/wood dowel, push assembly up into the air tube until seated flush against rolled end of air tube (fig 26d).
26a
26b
IMPORTANT! BOTH UPPER SEAL - HEAD AND CHOKE PISTON O - RINGS MUST BE WELL LUBRICATED WITH
5, 10
OR
15WT
BEFORE INSTALLATION.
OIL
27. Hold air tube with open end up. Pour 3 - 5cc RockShox 15wt suspension oil into air tube/positive air chamber, on top of upper choke assembly. This lubricates the choke o-ring and positive air piston o-ring when the fork is compressed. Set aside, upright, so oil does not spill.
PN 95.4309.887.000, REV. A
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2005 Reba SL/Race/Team Service Guide 28. Slide negative air seal-head onto DualAir spring shaft (flat end first). Slide up to bottom out bumper. Inner seal head o-ring must be lubricated with oil.
28
29. Lubricate positive and negative air piston o-rings well with with 5, 10 or 15wt oil before installation (figs 29a and b). Insert positive air piston into open end of air spring tube. Push into tube. (fig 29c) Using a small flat-head screwdriver, press down on the seal head shaft step to seat into place. (fig 29d) Secure the seal-head into air tube step with retaining ring. (figs 29e and f) IMPORTANT! CHECK
RETAINING RING; MUST BE FULLY SEATED IN UPPER TUBE GROOVE.
29a
29c
29d
29e
29b 29f 30. Pressurize the positive air chamber (40 to 60 psi) to ensure assembly components are seated properly inside tube.
31. Insert air tube guide plate onto end of air tube (fig 31a). Secure around small seal-head groove with NEW 13mm external retaining ring (fig 31b). Verify retaining ring is seated against guide plate so it can not move freely (fig 31c). IMPORTANT!
EXTERNAL
31b
31c
RETAINING RINGS
MAY DEFORM WHEN REMOVED AND INSTALLED.
PINCH
30
31a
ENDS TIGHT WITH PLIERS TO ENSURE
CORRECT FIT.
THE U-TURN AIR SPRING ASSEMBLY
TUBE/CROWN.
IS NOW ASSEMBLED AND READY TO BE INSTALLED INTO FORK UPPER
32. Place Teflon washer over threaded shaft end, (flat against travel shaft).
32a 8
32b
© SRAM Corporation • 2005 REBA SL/RACE/TEAM SERVICE GUIDE
2005 Reba SL/Race/Team Service Guide 33. Insert the Air U-Turn spring assembly into the bottom left fork upper tube (adjuster end first, fig 33a). Slide the assembly into upper tube until it engages the top cap (fig 33b). Hold bottom of air shaft, turn counterclockwise, and thread assembly into top cap until it stops (fig 33c).
33b
33c
33a 34. Insert each detent spring into top cap detent hole. Place detent ball bearings on top of detent springs (fig 34a). Place the Air U-Turn adjuster knob onto hex shaft end. Secure with external retaining clip. Press clip into groove with small flat-head screwdriver (fig 34b). Make sure retaining clip is inserted into groove, not air shaft threads.
34a
34a
34c
IMPORTANT! AIR U-TURN FORK MUST BE SET TO FULL-TRAVEL SETTING BEFORE INSTALLING TURN AIR U-TURN KNOB LOWER LEGS . COUNTERCLOCKWISE TO SET TRAVEL TO 115MM (FIG 3). S K I P TO S T E P 4 7 . D U A L - A I R S P R I N G A S S E M B LY
R E M O VA L 35. Remove all air pressure from positive (top) and negative (bottom) air chambers. Depress the schrader valves to remove air (fig 35a). Using a 24mm socket wrench, loosen and remove the DualAir top cap assembly from upper tube/crown (fig 35b).
35a
35b
36. Using snap ring pliers, remove the air spring shaft guide retaining ring from bottom of upper tube.
36 37. Insert a dowel into upper tube, through crown. Push down while pulling DualAir spring assembly down and out of upper tube. Air spring assembly fits tightly into upper tube so you must pull hard!
37a PN 95.4309.887.000, REV. A
37b 9
2005 Reba SL/Race/Team Service Guide 38. Spray isopropyl alcohol into upper tube (fig 38a). Wrap a clean rag around a long dowel. Insert rag into upper tube and clean inside of tube (fig 38b).
38a
38b
D I S A S S E M B LY A N D S E RV I C E Service Kit Part# Required: 11.4309.004.000, AM REBA DUALAIR O-RING SERVICE KIT 39. Spray DualAir assembly with isopropyl alcohol to clean assembly parts (fig 39a). Remove the DualAir positive air piston o-ring and replace (fig 39b).
39a
39b
40. Slide the negative air piston/seal head assembly off DualAir spring shaft (fig 40b-d).
40b
40c
40d
41a
41b
41c
42a
42b
42c
40a
41. Remove the negative air piston outer and inner o-rings (figs 41a and b). Replace and coat new inner o-ring with suspension oil (5, 10 or 15wt) (fig 41c).
42. Coat positive and negative outer piston o-rings with suspension oil (5, 10 or 15wt) (figs 42a and b). Slide negative air piston/seal head assembly back onto DualAir spring shaft (fig 42c).
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© SRAM Corporation • 2005 REBA SL/RACE/TEAM SERVICE GUIDE
2005 Reba SL/Race/Team Service Guide A L L - T R AV E L C O N F I G U R AT I O N S All Travel shaft spacers are located just under the positive air piston. Remove spacer to increase travel or add spacer to decrease travel.
I N S TA L L AT I O N 43. Insert positive air piston/shaft assembly (piston first) into bottom of clean upper tube (fig 43a). Push into upper tube (fig 43b). Insert negative air piston into upper tube. Push into upper tube completely (fig 43c). You may need to press negative schrader valve while pushing assembly to relieve pressure.
43a 44. Install the flat retaining washer against upper tube step (fig 44a). Insert wavy washer against retaining ring. Push shaft base into upper tube (fig 44b). IMPORTANT! EXTERNAL RETAINING RING MUST FIT UPPER TUBE GROOVE. VERIFY BEFORE CONTINUING.
43b
43c
44a
44b
SECURE INTO
45. Insert the shaft base plate/guide into upper tube step (fig 45a). Push in and secure with external retaining ring (fig 45b).
45a 45b
46. Invert the fork in bicycle stand 90 degress. Measure and pour or inject, 3 to 5cc/ml, 5wt RockShox suspension oil into air spring chamber (fig 46a). Oil lubricates positive air spring o-ring/seal. Install DualAir top cap; tighten and torque to 60 in-lb using a 24mm socket wrench (fig 46b).
46a
PN 95.4309.887.000, REV. A
46b
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2005 Reba SL/Race/Team Service Guide
MOTION CONTROL DAMPER SERVICE (ALL REBA FORKS) R E M O VA L 47. Compression Knob: Using snap ring pliers, remove external compression adjuster knob (plastic or aluminum remote) retaining ring (fig 47a). Remove compression adj. knob and top cap seal (o-ring) (fig 47b & 47c). NOTE: THE REMOTE PICTURED
AT
RIGHT
47a
47b
47c
48a
48b
KNOB TOP CAP SEAL IS
(FIG. 47C).
REMOTE
COMPRESSION ADJUSTER KNOBS USE A WHITE PLASTIC WASHER/TOP CAP SEAL.
48. Using a 24mm socket wrench, loosen compression damper top cap from upper tube (fig 48a). By hand, slowly pull and remove compression damper from upper tube (fig 48b). IMPORTANT! USE CARE WHEN REMOVING COMPRESSION DAMPER FROM UPPER TUBE. USE A SLOW TWISTING MOTION WHILE PULLING UP SLOWLY. THIS EASES THE O-RING PAST THE UPPER TUBE THREADS.
49. Inspect compression damper o-rings (located at top and bottom of damper) and replace if worn, knicked or torn. Apply oil to new o-rings.
49 Upgrade: Non-Remote to Remote Adjust Upgrading a non-Remote compression adjust fork (crown-mounted adjuster knob) to a Remote compression adjust (Remote lever (PopLoc) adjuster), requires replacing the non-Remote compression damper with a remote compression damper. The Remote return spring is designed into the compression damper, and is required for use with the PopLoc Remote lever assembly.
Remote Compression Adjust Damper
Standard Compression Adjust Damper (non-remote) External Gate Adjuster Knob Spring Tube
Remote No Remote Return Spring Return Spring
12
© SRAM Corporation • 2005 REBA SL/RACE/TEAM SERVICE GUIDE
2005 Reba SL/Race/Team Service Guide 50. Remove fork from bicycle stand and pour damper oil into oil pan.
50 51. Use snap ring pliers to remove rebound damper/seal head retaining ring and base ring, located inside bottom of right upper tube (fig 51a). Pull to remove rebound damper and seal head from upper tube (figs 51b to d).
51b
51a
51d
51c
52. Slide the seal head off damper shaft (figs 52a and b). Remove and replace outer and inner seal head o-rings (figs 52c and d). Coat new o-rings with suspension oil (5, 10 or 15wt) (fig 5).
52a
52b
52c
53. Spray rebound damper shaft with isopropyl alcohol. Wipe shaft with a clean rag.
52d
52e
54. If damaged, remove and replace rebound damper piston glide ring.
53a
53b
55. Spray isopropyl alcohol into the upper tube. Wrap a clean rag around a long dowel/rod. Insert rag into the upper tube and clean inside of tube.
55a
55b
PN 95.4309.887.000, REV. A
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2005 Reba SL/Race/Team Service Guide I N S TA L L AT I O N 56. Insert rebound damper piston into bottom of upper tube. Insert it at an angle, open ended side of glide ring out. This aids insertion of piston and glide ring. Angle and rotate until glide ring is inside upper tube (fig 56a). Slide seal head up into upper tube step. Position basering/washer and seal-head into upper tube step. (figs56a and b)
56b
56c
57. Press seal head firmly into upper tube (fig 57a). Secure seal head into upper tube with retaining ring (fig 57b). Ensure retaining ring is secure in the upper tube groove. Pull rebound damper shaft down/out to full fork travel/extension.
57a
57b
58. With rebound damper shaft in the fully extended position, measure and pour 110cc (+/-5cc) RockShox 5wt suspension oil into upper tube through crown (fig 58a). Or, pour oil into upper tube through crown, and measure 5" (+/- 0.25") (127mm) oil-height level, measured from the top of the crown, down to top of the oil level (fig 58b).
58a
58b
59a
59b
IMPORTANT! OIL
HEIGHT IS CRITICAL.
DAMPING PERFORMANCE.
TOO
TOO
56a
LITTLE OIL DECREASES
MUCH OIL REDUCES AVAILABLE FORK
COMPRESSION/TRAVEL, AS WELL AS RISK DAMAGE TO FORK FROM COMPRESSION BOTTOM-OUT.
59. Insert compression damper into upper tube, through crown. Press firm and push damper into upper tube slowly. Use a slow twisting motion while firmly pressing compression damper into upper tube. Using a 24mm socket wrench, tighten to 60 in-lb. NOTE: POSITION
ENSURE COMPRESSION DAMPER IS IN THE (TURN ADJUSTER SHAFT COUNTERCLOCKWISE).
60. Insert the compression damper top cap seal (o-ring) over top cap (fig 60a). Place compression knob onto top cap, with the dial at the 3 o'clock position Using snap ring pliers, secure compression knob with external retaining ring (fig 60b and d). Remote knob should be positioned with cable set screw at three o'clock (fig 60d). NOTE: REMOTE
60a
60b
KNOB TOP CAP SEAL PICTURED AT RIGHT (FIG
USES A WHITE PLASTIC WASHER/TOP CAP SEAL.
14
FULL-OPEN
60c
60C). REMOTE
60d
COMPRESSION ADJUSTER KNOB
© SRAM Corporation • 2005 REBA SL/RACE/TEAM SERVICE GUIDE
2005 Reba SL/Race/Team Service Guide 61. Motion Control Remote Forks: Cable Installation a. Thread remote cable through cable-stop base. b. Thread cable around compression knob, under cable set-screw, and tighten with a 2mm hex wrench. Knob should be in the 3 o'clock position and full-open. c. Test PopLoc remote lever function for proper lockout/compression adjust. d. Adjust cable tension as needed.
L O W E R L E G I N S TA L L AT I O N 62. Invert fork in bicycle stand to 45 degree angle, upper tubes facing up. Spray upper tubes with isopropyl alcohol and wipe with a clean rag. 63. Pour, or inject, a small amount of 5, 10 or 15wt RockShox suspension oil onto new or clean foam rings, just under dust seal, inside lower leg; each side. NOTE: FOR GUIDE.
FOAM RING AND DUST SEAL INSTALLATION, SEE THE
63
BUSHING INSTALLATION
64. Slide the lower leg assembly over and onto the ends of each upper tube. Make sure both dust seals slide onto the tubes correctly and do not fold under.
64a
64b
65. Slide lower leg assembly onto upper tubes until you feel the lower bushings touch the end of the upper tubes and stop (fig 65a). Measure and pour (or inject...an oil syringe works best) 15cc of 5, 10, or 15wt RockShox suspension oil into both Lower Legs, through both (left and right) shaft bolt holes (fig 65b). Wipe all excess oil from lower legs (fig 65c).
65a
65b
65c
65a
65b
66. Inspect and clean damper shaft bolt and black nylon crush washer. Replace crush washer and crush washer retainer if damaged. Damaged crush washers can cause oil to leak (fig 1). Insert damper shaft bolt into threaded shaft end and tighten with a 5mm hex wrench to 60 in-lb (fig 2). Insert external rebound damper knob into damper shaft bolt. Push in to secure (fig 3).
PN 95.4309.887.000, REV. A
65c
15
2005 Reba SL/Race/Team Service Guide 67. Inspect and clean DualAir shaft nut crush washer. Replace if damaged (fig 1). Thread nut onto DualAir threaded shaft (fig 2). Using a 10mm open-end wrench, tighten to 60 in-lb (fig 3). Wipe away excess oil.
67b
67a
67c
68. Spray a light coating of isopropyl alcohol onto entire fork, and wipe with a clean rag. Replace decals if needed. 69. Inflate positive air chamber first, with shock pump, to desired air pressure. See chart or decal on back of fork lower leg, for reference. Thread air valve cover cap onto threaded valve shaft. 70. Next, inflate negative air chamber, with shock pump, to desired air pressure. See chart, or decal on back of fork lower leg, for reference. Thread air valve cover cap onto threaded valve shaft. NOTE: ALWAYS
INFLATE POSITIVE AIR FIRST!
INCREASED
NEGATIVE AIR PRESSURE DECREASES INITIAL
COMPRESSION BREAK-AWAY FORCE REQUIRED, MAKING FORK MORE ACTIVE OVER SMALL BUMPS. WITH NEGATIVE AIR PRESSURE TO FIND DESIRED RIDE CHARACTERISTICS.
EXPERIMENT
AIR A i r Sp r i n g Tu n i n g
With independently adjustable positive (top) and negative (bottom) air chambers, the air spring system of your Reba fork can be easily tuned for your weight and riding style. Use the following instructions as a starting point. If further fine tuning is desired, follow the hints at the end of this section.
STEP 1 - SELECTING POSITIVE AIR PRESSURE
Positive air pressure determines the amount of force required to compress your fork. More positive air pressure will result in less suspension sag and higher bottom out forces. Less positive air pressure will result in more suspension sag and lower bottom out forces. Using the chart below as a guideline, inflate the positive air chamber to the desired pressure. NOTE: AIR U-TURN
PRESSURE SHOULD BE SET AT
Rider Weight < 120 120-140 140-160 160-180 >180 (99 kg)
115MM
OF TRAVEL.
Air U-Turn Air Pressures 80-115 psi 115-130 psi 130-145 psi 145-160 psi 180 psi
Dual Air Air Pressures 70-100 psi 100-115 psi 115-130 psi 130-145 psi 160 psi
S T E P 2 - S E L E C T I N G N E G AT I V E A I R P R E S S U R E
Negative air pressure effects the amount of force required to initiate suspension travel. Negative air pressure works with bump input AGAINST the force of the positive air chamber. More negative air pressure results in a suspension set-up that is more active, especially to small bump input. Less negative air pressure results in a suspension set-up does not move or "bob" under rider input or small bumps. Using the chart below as a guideline, inflate the negative air chamber to the desired pressure.
Rider Weight < 120 120-140 140-160 160-180 >180 16
Air U-Turn Air Pressures More Active Less Active 80-115 psi 50-70 psi 115-130 psi 70-80 psi 130-145 psi 80-90 psi 145-160 psi 90-100 psi 180 psi 110 psi
Dual Air Air Pressures More Active Less Active 70-100 psi 40-60 psi 100-115 psi 60-70 psi 115-130 psi 70-80 psi 130-145 psi 80-90 psi 160 psi 100 psi
© SRAM Corporation • 2005 REBA SL/RACE/TEAM SERVICE GUIDE
2005 Reba SL/Race/Team Service Guide
TROUBLESHOOTING Air Loss • Inspect air piston o-rings. Replace if necessary. • To avoid air loss, remove DualAir top cap and check oil level inside air chamber, every 25-50 riding hours. If there is little or no oil on top of air piston o-ring, pour 3 - 5cc RockShox 15wt suspension oil into air spring chamber. For UTurn Air version, the schrader valve core can be removed to add oil tothe positive chamber. This keeps air seal lubricated. • Inspect schrader valve assembly. Replace if damaged or malfunctioning. Clean if clogged.
L o s s o f / o r Va r i a n c e i n D a m p i n g • Inspect all damper o-rings. Replace and grease. • Inspect damper oil volume. Remove damper top cap/compression damper assembly. Using a thin ruler, measure the oil height. Correct height is 5 inches from the top of the upper tube. Add or remove oil as needed. • Remote: Inspect remote cable tension. Cable may stretch, or become loose. Loosen cable screw, tension cable, and tighten. Test. Adjust as needed.
Bushing Play • Inspect and replace worn bushings. Bushings are a wear and tear item, and need to be replaced after approximately 100200 riding hours, depending your riding style, condition, riding time, and body weight. If you ride a lot, check the bushings! • See the 'Bushing Installation' guide at www.rockshox.com for procedures.
Oil Loss • Inspect the air piston o-ring for air bypass. Air pressure can force oil out of the left dust seal. • Inspect your shaft bolt crush washers. Replace if worn or damaged. • Inspect your top cap o-rings. Replace if torn or knicked.
PN 95.4309.887.000, REV. A
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