Marzocchi Jr. T QR20 Instructions Manual Download Page 11

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Super T

QR20

FIG. 7

Pull the hydraulic cartridge

(21)

complete

with foot washer (

, see exploded view)

out of the stanchion tube.
Replace the whole hydraulic cartridge.

GUIDE BUSHING AND SEAL
ASSEMBLY CHANGE
FIG. 8

Pull the stanchion tube

(28)

completely out

of the slider

(27)

FIG. 9

Use a small screwdriver and remove the
dust seal

(22)

from slider top.

Summary of Contents for Jr. T QR20

Page 1: ... tightened then tighten the second screw and then go back to the first one and screw it tighter 4 Clean all metal parts with a special preferably biodegradable solvent such as trichloroethane or trichloroethylene 5 Before reassembling lubricate all parts in contact with each other using silicone fat spray 6 Always grease the conic seal rings be fore reassembling 7 Use wrenches with metric size onl...

Page 2: ...eal 1 Replace oil seal 2 Replace stanchion tube oil seal and dust seal 3 Clean the oil seal seat and replace oil seal Fork has not been used for some time and is locked out Oil seals and dust seals tend to stick to stanchion tube Raise dust seal and lubricate stanchion tube oil seal and dust seal Fork rebounds too fast even though the adjuster is set to hardest damping position Cartridge is faulty...

Page 3: ...E FRAME FIG A Remove the upper crown 1 from steer tube and fork legs by loosening the 3 fastening bolts 11 1 11 RECOMMENDATIONS FOR MAINTENANCE MARZOCCHI forks are based on advanced technology supported by year long experi ence in the field of professional mountain biking In order to achieve best results we recommend to check and clean the area below the dust seal and the stanchion tube after each...

Page 4: ...crown 1 If fork legs overprotrude fit some spacers C to the plate close to the steer tube 1 C 28 FIG D Fit the handlebar support and the A Head Set cap over the upper crown 1 and then adjust the steering Now finally tighten the 3 bolts 11 on the upper crown to 11 Nm WARNING Loosen the 3 screws 11 on the upper crown before adjusting the steering Tighten the above bolts to the specified torque when ...

Page 5: ...for the proper torque of screws fastening stan chion tube onto lower crown and on upper crown 15 28 Nm 11 FIG E If the crown 13 position with respect to the stanchions 28 has been changed for any reason adjust the original distance Distance H between crown and tyre edge when inflated should not be lower than total travel 170 mm 3 mm WARNING if lower Crown is im properly matched with stanchions it ...

Page 7: ...the maximum value equal to 15 mm of spring preload This adjustment is essential in order to have the right fork response for the rider s weight and riding style REBOUND DAMPING ADJUSTMENT The fork legs feature an adjuster C for REBOUND damping adjustment Turning this adjuster clockwise into the cartridge rod changes the hydraulic setting of the inner valves In short the amount of adjust ment appli...

Page 8: ...the quickest procedure and the exact disassembling sequence Start from the part to be disassembled and then follow the arrows to remove the other parts DISASSEMBLY DIAGRAM STOP RING FIG 2 STANCHION TUBE FIG 8 DUST SEAL FIG 9 SPRING FIG 5 PRELOAD KNOB FIG 1 HYDRAULIC CARTRIDGE CHANGE FOOT NUT FIG 6 HYDRAULIC CARTRIDGE FIG 7 GUIDE BUSHING AND SEAL ASSEMBLY CHANGE OIL SEAL FIG 11 UPPER WASHER FIG 12 ...

Page 9: ... wrench Remove grub screw from cap assembly FIG 2 Remove the stop ring 4 from the top of the preload knob support with a small screw driver FIG 3 Place the stanchion tube in a vice Be sure not to damage or squeeze stanchion in the process Unscrew the plugs 5 with a 26 mm hexagon wrench Remove the plugs complete with the O ring 6 from the stanchions 2 3 4 5 6 ...

Page 10: ...e oil drain into the fork leg By following this procedure there is no need to check the oil level Make all necessary changes HYDRAULIC CARTRIDGE CHANGE FIG 6 Let all the oil drain out WARNING Remember to always recycle any used oil To change the fork leg oil follow the proce dureasdescribedinsection REASSEMBLY from FIG 22 to FIG 27 Turn the fork leg upside down and unscrew the foot nut 35 complete...

Page 11: ...r 36 see exploded view out of the stanchion tube Replace the whole hydraulic cartridge 21 28 27 22 GUIDE BUSHING AND SEAL ASSEMBLY CHANGE FIG 8 Pull the stanchion tube 28 completely out of the slider 27 FIG 9 Use a small screwdriver and remove the dust seal 22 from slider top ...

Page 12: ...place IMPORTANT when removing the stop ring make sure not to damage its seat FIG 11 Fit the slider protector A onto the slider and remove the oil seal 24 with the help of a large slot screwdriver IMPORTANT when removing the oil seal make sure not to damage its seat Once removed the oil seals should not be used again FIG 12 Remove the upper washer 25 from the slider 23 24 A 25 ...

Page 13: ...Super T QR20 FIG 13 Fit the bit of a small screwdriver into the upper edge slot of the guide bushing 26 and lift gently Pull the bushing out of the slider and make all necessary changes 26 ...

Page 14: ...Check that no dirt or debris is between slider and bushing Insert the guide bushing 26 into place so that it adheres to the slider FIG 15 Fit the upper washer 25 into the slider so that it touches the guide bushing FIG 16 Lubricate the oil seal 24 and place it onto the seal press B with the hollow side toward the slider Press the oil seal into place until it touches the lower washer by using the a...

Page 15: ...stanchion tube while inserting it into the seal to reduce the chance of dam aging the seals Turn the slider over and check that cartridge thread 21 is sticking out through the slider hole Check to see that the stanchion tube slides unrestricted by cycling the fork up and down several times The tube should slide freely inside the seal assembly without any side play In the event it is too hard or to...

Page 16: ...ic cartridge threaded end Tighten to 11 Nm Pump stanchion up and down several times to make sure it slides properly through the stroke HOW TO FILL WITH OIL FIG 22 Pour the oil little by little when the stanchion tube is fully down and then pump with the cartridge 21 rod so as to have a better filling Cartridge is full when no air is detected when pumping in the fully compressed position Check that...

Page 17: ... the preload knob support and the O ring 6 on the cap 5 FIG 24 Move the plunger 7 see exploded view in the cap to the minimum preload posi tion Screw the complete cap 5 onto the car tridge 21 rod Screw cap all the way in Tighten check nut 18 against cap 5 FIG 25 Take out stanchions and fit caps 5 by hand Place the stanchions in a vice making sure theyarenotdamagedordentedandtighten the caps to 20 ...

Page 18: ... knob support and make sure it is properly seated into place FIG 27 Fit the preload knob 2 and secure it on the support by tightening the grub screw 3 to 1 5 Nm Install fork legs into crown and upper crown as specified in section INSTALLATION 4 Nm 1 5 2 3 ...

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