Marzocchi Z3 QR20 Manual
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Marzocchi Z3 QR20 Manual

Marzocchi Z3 QR20 Manual

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Z3
QR20
(110)
175
+0.05
Ø30
0
80
+0.5
110
0
130
GENERAL
18
• The fork is sprung by a mechanical coil system and uses hydraulic
rebound damping.
• Spring pre-load adjustment controlled via external top mount
adjuster, rebound damping adjustment controlled by bottom
adjuster of right fork leg.
• Stanchions fitted into lower Crown by cryofit technique. Full length
bushings guarantee superior rigidity.
• Sliders and arch are an integral assembly for reduced weight and
improved rigidity.
Ø30
• Parts subjected to friction are cooled and lubricated by a specially
formulated oil.
• QR20 wheel shaft retaining system for special hubs (110-mm stop)
and wheel shafts with 20-mm diameter.
Steer tube: stainless steel or, on request, EASTON aluminum steer
tube available for 1 1/8" diameter, threadless.
Crown: Forged and CNC-machined BAM aluminum alloy.
Arch: Cast magnesium alloy.
0
15
-0.1
Stanchions: anodized EASTON aluminum with variable butting.
+1
20
0
Springs: Constant pitch springs.
Sliders: Forged and CNC-machined BAM aluminum alloy. Left
slider comes with supports for disc brake caliper.
Slider bushing: Full length guide bushings composed of a copper
base and impregnated with an anti-friction coating.
Seals: Computer designed oil seals guarantee the highest quality
seals available.
Oil: Specially formulated oil which eliminates foaming and viscosity
breakdown while providing complete stiction-free performance.
Fork leg oil: 85 cc (each leg), type EBH 16 - SAE 7.5.
26.5
BAM: Bomber Aerospace Material.
Special alloy developed from aerospace material.

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Summary of Contents for Marzocchi Z3 QR20

  • Page 1 GENERAL • The fork is sprung by a mechanical coil system and uses hydraulic rebound damping. +0.05 • Spring pre-load adjustment controlled via external top mount Ø30 adjuster, rebound damping adjustment controlled by bottom adjuster of right fork leg. • Stanchions fitted into lower Crown by cryofit technique. Full length bushings guarantee superior rigidity.
  • Page 2 GENERAL • The fork is sprung by a mechanical coil system and uses hydraulic rebound damping. +0.05 Ø30 • Spring pre-load adjustment controlled via external top mount adjuster, rebound damping adjustment controlled by bottom adjuster of right fork leg. • Stanchions fitted into lower Crown by cryofit technique. Full length bushings guarantee superior rigidity.
  • Page 3 SPECIALIZED GENERAL • The fork is sprung by a mechanical coil system and uses hydraulic rebound damping. • Spring pre-load adjustment controlled via external top mount +0.05 Ø30 adjuster, rebound damping adjustment controlled by bottom adjuster of right fork leg. •...

  • Page 4: General Rules

    INSTRUCTIONS GENERAL RULES 1. Where specified, assemble and disas- semble the shock absorption system using the M special tools only. ARZOCCHI 2. On reassembling the suspension sys- tem, always use new seals. 3. Clean all metal parts with a special, preferably biodegradable solvent, such as trichloroethane or trichloroethylene.

  • Page 5: Failures, Causes And Remedies

    FAILURES, CAUSES AND REMEDIES This paragraph reports some failures that may occur when using the fork. It also indicates possible causes and suggests a remedy. Always refer to this table before doing any repair work. FAILURES CAUSES REMEDIES Oil leaking though the top of slider 1.

  • Page 6: Recommendations For Maintenance

    RECOMMENDATIONS FOR MAINTENANCE forks are based on advanced ARZOCCHI technology, supported by year-long expe- rience in the field of professional moun- tain biking. In order to achieve best re- sults, we recommend to check and clean the area below the dust seal and the stanchion tube after each use and lubri- cate with silicone oil.

  • Page 7: Installation

    INSTALLATION Installing the fork on a bicycle is a very Fit bolt end (C) in suitable slider groove DISC BRAKE SYSTEM ASSEMBLY delicate operation that should be carried and tighten the screw (D) to specified WARNING: If a disc brake sys- out with extreme care.

  • Page 8: Spring Preload

    ADJUSTMENT SPRING PRELOAD REBOUND ADJUSTMENT Spring preload determines COMPRES- Right slider botom is equipped with an SION damping and is adjusted by turning adjuster screw (C) for REBOUND damp- the adjustment knob (3) on the top of the ing. fork legs. From the factory the fork is set at To adjust, always start from the minimum minimum preload, i.e.

  • Page 9: Disassembly Diagram

    DISASSEMBLY GENERAL – The reference numbers given in this section relate to the components shown in the fork exploded view. – Before starting any operation. please read the diagram below. It shows the quickest procedure and the exact disassembling sequence. Locate the part you need to remove in the diagram, then look at the arrows to determine which other parts you need to remove first.
  • Page 10 SPRING CHANGE FIG. 2 PILOT BUSHING AND SEAL FIG. 1 Push the stanchions into the sliders and ASSEMBLY CHANGE Unscrew the caps (4) with a 21 mm remove the lower washer (11) and the FIG. 3 (only right leg) socket wrench. spring (34) from each fork leg.
  • Page 11 FIG. 4 FIG. 5 FIG. 6 Remove foot nuts (26) and (29) with a Withdraw the crown and stanchions as- Remove the dust seal (19) from the top of socket wrench. sembly (1) from the sliders. the sliders using a small screwdriver. QR20...
  • Page 12 FIG. 7 FIG. 8 FIG. 9 Remove the stop ring (20) from the sliders Fit the slider protector (A) onto the slider Remove the upper washer (22) from the by placing the screwdriver bit in one of the and remove the oil seal (21) with the help slider.
  • Page 13 FIG. 10 REPLACING PUMPING ELEMENT FIG. 12 Fit the bit of a small screwdriver into upper SEALS Withdraw the pumping elements (14) edge slot of the pilot bushing (23) and lift FIG. 11 and (12) and the rebound spring (15) gently.
  • Page 14 FIG. 13 (only right leg) VALVE ASSEMBLY CHANGE Remove the stop ring (33) from pumping FIG. 14 element bottom (14) with a small flat To check that the valve assembly is oper- screwdriver. ating correctly, it is necessary to work on Mark stop ring seat into inner rod for the inside of the stanchion tube.
  • Page 15 REASSEMBLY CAUTION: before reassembling, all metal FIG. 16 FIG. 17 components should be washed carefully Fit the upper washer (22) into the slider so Lubricate the oil seal (21) and place it with inflammable, preferably biodegrad- that it touches the pilot bushing. onto the seal press (B) with the hollow able, solvent and dried with compressed side toward the slider.
  • Page 16 FIG. 18 FIG. 19 PUMPING ROD ASSEMBLY Insert the stop ring (20) into the slider Lubricate the dust seals (19) and fit them FIG. 20 (only right leg) making sure it is properly seated into into the stanchions from the spring end. Lubricate the O-ring (27) and fit inner rod place.
  • Page 17 VALVE AND PUMPING ROD FIG. 22 FIG. 23 ASSEMBLY Lubricate the O-rings (24-25) and reas- Fit this assembly into the stanchion tube FIG. 21 semble the foot buffer (18) onto pumping and properly seat the valve assembly After having overhauled or replaced the element ends (14) and (12).
  • Page 18 CROWN AND STANCHIONS FIG. 25 FIG. 26 ASSEMBLY Screw the foot nuts (26) and (29) on the Fit the retainer (D) into the slider (E) to FIG. 24 threaded elements of pumping elements reassemly the adjuster unit (28). Fit the crown and stanchions assembly (1) (14) and (12).
  • Page 19 HOW TO FILL WITH OIL SPRING AND CAP FIG. 29 FIG. 27 FIG. 28 Lubricate the O-ring (5) on the cap (4). Pour oil little by little when the stanchions Fit the springs (34) into each stanchion Turn preload adjuster are fully down and then pump with the tube.

  • Page 20: Specific Marzocchi Tools

    SPECIFIC MARZOCCHI TOOLS R e f . I t e m . Description and use R 5089 AB Slider protector: to remove the oil seal from the slider R 5090 Oil seal press: to press oil seal into the slider...

This manual is also suitable for:

Z3 qr20 110Z3 qr20 130Z3 qr20 100

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