Marzocchi MXC+ECC Air User manual

MXC
+
ECC
Air
INSTRUCTIONS
GENERAL RULES
1. Where specified, assemble and disas-
semble the shock absorption system us-
ing the M ARZOCCHI special tools only.
2. On reassembling the suspension system,
always use new seals.
3. Clean all metal parts with a special,
preferably biodegradable solvent, such
as trichloroethane or trichloroethylene.
4. Before reassembling, lubricate all parts
in contact with each other using silicone
fat spray or a specific oil for seals.
5. Always grease the lip seal rings before
reassembling.
6. Use wrenches with metric size only.
Wrenches with inch size might damage
the fastening devices even when their
size is similar to that of the wrenches in
metric size.

MXC
+
ECC
Air
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
Adjuster position does not affect fork
operation
1. Dirt inside legs
2. Pumping element of r.h. leg does not
work properly.
1. Clean carefully and change oil
2. Replace pumping element.
Oil leaking through the bottom of slider O-ring on the pumping rod or on cartridge
securing nut bottom damaged
Replace the O-ring
Oil leaking through the top of the slider 1. Oil seal is worn out
2. Stanchion tube is scored
3. Excessive dirt on slider oil seal
1. Replace oil seal
2. Replace crown/stanchions assembly, oil
seals and dust seals
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
stanchions
Raise dust seal and lubricate stanchion
tube, dust seal and oil seal
Pressure drop Cap valve damaged Replace cap and/or valve
Excessive play of stanchions in the sliders Pilot bushings worn out Replace bushings
Fork rebounds too fast in any adjuster
position
Dirt inside fork legs Clean carefully and change oil
Fork does not react to rebound lock LH fork cartridge faulty Replace hydraulic cartridge

MXC
+
ECC
Air
RECOMMENDATIONS FOR
MAINTENANCE
M ARZOCCHI 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 use and lubricate with silicone
oil.
In general, M ARZOCCHI forks can offer top
performance from the start. However, in
some cases a short running-in period is
required (5-10 hours) for inner adjustments.
This running-in period will make fork life
longer and ensure fork top performance
over time.
IMPORTANT: change oil at least every
100 working hours and check pressure at
least every 10 working hours.
Polished forks should be cleaned with
bodywork polish at regular intervals in
order to preserve their original finish.
INSTALLATION
Installing the fork on a bicycle is a very
delicate operation that should be carried
out with extreme care. The installation should
always be checked by one of our Technical
Service Centers.
WARNING: Steer tube/headset
mounting and adjustment must be
carried out in compliance with the headset
manufacturer’s instructions. Improper in-
stallation may jeopardize the safety of the
rider.
To replace it, contact one of our Technical
Service Centers with the required tools.
WARNING: In case of improper
installation of the steer tube into the
crown, the rider might lose control of his/
her bicycle, thus jeopardizing his/her safety.
DISC BRAKE SYSTEM ASSEMBLY
If a disc brake system is installed, brake
supports fixing pins can be replaced with
screws (part no. 532979QF) available as
spare parts.
Tighten the above screws to 10 Nm.
Assembling the brake caliper onto the slider
is a very delicate operation that should be
carried out with extreme care.
Improper assembly might overstress the
caliper supports which might break.
When installing the disc brake system, be
sure to properly follow the instructions given
by the manufacturer.

MXC
+
ECC
Air
D
D
D1
2
CC
4
LOCK
ADJUSTMENTS
FORK LEG PRESSURIZATION
Blow pressurized air through the valves to set
COMPRESSION damping. To change the
pressure inside the fork legs, remove the
protection cap (2) and depressurize each
leg by pushing lightly on valve pin with a bit.
Fully tighten adapter fitting (D), supplied
with the fork, on M ARZOCCHI pump (C).
Screw fitting end –with O-ring (D1) on
valve, and pressurize until the required value
is reached. Unscrew the fitting/pump as-
sembly and refit the cap (2).
IMPORTANT: inflate using special
M ARZOCCHI pump with pressure gauge.
Use of improper tools or other procedures
than specified ones might lead to improper
inflating.
NOTE: in case of air leakages when adapter
fitting (D) is fitted, ensure that the O-ring
(D1) is not damaged.
REBOUND LIMITER
(only left leg)
In case of hard uphill path, fork leg rebound
can be locked for improved behavior.
Position the knob (4) on l.h. fork leg top to
“LOCK” to lock rebound limit in this posi-
tion; this also allows to decrease fork leg
height for optimal attitude uphill, thus sup-
porting suspension compression operation.
Reposition the knob to its original position
so that the fork will rebound and restart to
work as before.
WARNING: do not position to
“LOCK” when riding downhill as
available travel might not be enough, thus
jeopardizing rider’s safety

MXC
+
ECC
Air
E
32
REBOUND ADJUSTMENT VIA
INNER PUMPING ROD
The adjuster controlling REBOUND damp-
ing adjustment is accommodated inside
the pumping element (32) inside the r.h.
fork leg.
To access the adjuster, unscrew the top cap
(8) and push the stanchions fully down (see
section DISASSEMBLY Fig. 2).
Fit the supplied hexagon rod (E) into the
stanchion tube and into the adjuster inner
hole. Rotate the adjuster clockwise for harder
damping, counterclockwise to soften it.
Refit the cap (8) and tighten it to the
specified torque (see section REASSEMBLY,
Fig. 29).

MXC
+
ECC
Air
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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.
DISASSEMBLY DIAGRAM
▲
▲
FOOT NUT FIG. 5
SEAL ASSEMBLY AND
PILOT BUSHING CHANGE
CROWN AND STANCHIONS
ASSEMBLY FIG. 7
STOP RING FIG. 9
OIL SEAL FIG. 10
UPPER WASHER FIG. 11
PILOT BUSHING FIG. 12
HYDRAULIC CARTRIDGE, REBOUND
SPRING AND WASHER FIG. 6
HYDRAULIC CARTRIDGE CHANGE
(l.h. fork leg)
FORK OIL CHANGE
STANCHION TUBE CAP FIG. 1/2/3
AIR VALVE CHANGE
FIG. 15
REPLACING PUMPING ELEMENT
(r.h. fork leg)
REPLACING VALVE ASSEMBLY
REBOUND BUMPER,
PUMPING ROD,
REBOUND SPRING FIG. 13
STOP RING, VALVE ASSEMBLY
FIG. 14
DUST SEAL FIG. 8

MXC
+
ECC
Air
4
3
6
34
11
8
5
STANCHION TUBE CAP
FIG. 1 (only left leg)
Loosen screw (3) and remove rebound
limiting knob (4).
FIG. 2
Depressurize each fork leg (see section
ADJUSTMENT).
Unscrew the caps (8) and (6) with a 21 mm
socket wrench.
Remove the caps complete with O-ring (5)
from the stanchion tubes.
FIG. 3 (only left leg)
Lock the check nut (34) and remove the cap
(6) from hydraulic cartridge end (11).

MXC
+
ECC
Air
118
20
19
11
9
FIG. 4
Push the stanchions (1) into the sliders (18)
and let all the oil drain out from the fork legs.
Pump the stanchions several times to help
oil drain off.
WARNING: Remember to always
recycle any used oil.
To change the fork leg oil follow the proce-
dure as described in section “REASSEMBLY”
from Fig. 27 to Fig. 30.
HYDRAULIC CARTRIDGE CHANGE
AND PUMPING ROD CHANGE
FIG. 5
Turn the fork leg upside-down and unscrew
the foot nuts (20) by the use of a 15 mm
socket wrench complete with O-Rings (19).
FIG. 6 (only left leg)
Remove the hydraulic cartridge (11) com-
plete with rebound spring (9) and foot
washer (23, see exploded view) from the
l.h. stanchion.
Replace the whole hydraulic cartridge.

MXC
+
ECC
Air
1
18
13 14
SEAL ASSEMBLY AND PILOT
BUSHING CHANGE
FIG. 7
Withdraw the crown and stanchions as-
sembly (1) from the sliders (18).
FIG. 8
Remove the dust seal (13) from the top of
the sliders using a small screwdriver.
FIG. 9
Remove the stop ring (14) from the sliders
by placing the screwdriver bit in one of the
three openings on the stop ring.
IMPORTANT: when removing the stop
ring, make sure not to damage its seat.

MXC
+
ECC
Air
15
A
16
17
FIG. 10
Fit the slider protector (A) onto the slider
and remove the oil seal (15) with the help
of a large 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. 11
Remove the upper washer (16) from the
slider.
FIG. 12
Fit the bit of a small screwdriver into upper
edge slot of the pilot bushing (17) and lift
gently. Pull the bushing out of the slider and
make all necessary changes.

MXC
+
ECC
Air
31
29
2625
32
27
39 38 28
Sx. Dx.
2
41
42
2
41
42
PUMPING ROD CHANGE
FIG. 13
Remove the foot buffer (26) with the o-ring
(25) from the pumping rod (32) end.
Withdraw the complete pumping rod (32)
and the rebound spring (29) from the top.
Replace the seal ring (31) if damaged or
worn out.
VALVE ASSEMBLY CHANGE
FIG. 14 (only right leg)
To check that the valve assembly is operat-
ing correctly, it is necessary to work on the
inside of the stanchion tube.
Slip off the stop ring (27) using pointed
pliers.
Pull the valve assembly out of the tube with
one finger in the following order: covering
(39), valve (38) and washer (28).
REPLACING AIR VALVE
FIG. 15
This operation can be performed when fork
is fully assembled and fitted on bike, but
only after draining inner pressure.
If the air valve is disassembled with the fork
removed, keep the fork vertical so as to
avoid any oil leakage.
Remove the air valve (41) and its O-ring
(42) from cap using a standard valve
wrench.
Check O-Ring and blow compressed air
onto valve to eliminate possible clogging.
Immediately replace damaged valve.
When reassembling, slightly lubricate the
O-ring (42) and screw the air valve (41)
until it stops without forcing. Then, refit the
cap (2).

MXC
+
ECC
Air
16
15
B
17
FIG. 17
Fit the upper washer (16) into the slider so
that it touches the pilot bushing.
FIG. 18
Lubricate the oil seal (15) and place it onto
the seal press (B) with the hollow side
toward the slider.
Press the oil seal until it touches the lower
washer by using the above seal press.
REASSEMBLY
CAUTION: before reassembling, all metal
components should be washed carefully
with inflammable, preferably biodegrad-
able, solvent and dried with compressed
air.
PILOT BUSHING AND SEAL
ASSEMBLY
FIG. 16
Check that no dirt or debris is between
slider and bushing. Insert the pilot bushing
(17) into place so that it adheres to the
slider.

MXC
+
ECC
Air
13
32
29
31
28
38
39
14
FIG. 20
Lubricate the dust seals (13) and fit them
into the stanchions from the spring end.
VALVE AND PUMPING ROD
ASSEMBLY (only right leg)
FIG. 21
After having overhauled or replaced the
valve unit and after having cleaned the
inside of the tube, reassemble. Assemble
valve components in correct sequence: cov-
ering (39) , valve (38) and washer (28).
Then fit pumping rod (32) with seal ring
(31) and rebound spring (29) into the
valve assembly.
FIG. 19
Insert the stop ring (14) into the slider
making sure it is properly seated into place.
Use buffer (B) to properly seat the ring into
the slider.

MXC
+
ECC
Air
25
26 32
30
27
F
1
13 13
FIG. 22
Lubricate O-rings(30) and (25) and reas-
semble the foot buffer (26) onto the end
part of pumping rod (32).
FIG. 23
Fit this assembly into the stanchion tube and
properly seat the valve assembly (F).
Insert the stop ring (27).
CROWN AND STANCHIONS
ASSEMBLY
FIG. 24
Fit the crown and stanchions assembly (1)
with the dust seals in place - gently into the
sliders seals.
WARNING: to avoid any damages
to sealing surfaces, keep the stan-
chions duly lubricated and squared into the
sliders.
Press the crown and stanchions assembly
fully down and check that threaded the end
of pumping element (32) is coming out
through the bottom of the r.h. slider.
Check to see that the stanchions slide unre-
stricted 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 too soft, repeat the previous
steps described above and check compo-
nents to ensure they are not damaged.
Seat the dust seals (13) on top of the
sliders.

MXC
+
ECC
Air
Nm 11
20
19
Travel Leg H
(mm) (mm)
80
100
Lh.
Rh.
Lh.
Rh.
40
40
40
40
H
11
9
FIG. 26
Lubricate O-Rings (19) on the foot nuts
(20) and screw them onto the pumping rod
(32) and cartridge (11) threaded end.
Tighten to 11 Nm.
Check to verify that the stanchions slide
properly through the stroke by pumping
them up and down several times.
HOW TO FILL WITH OIL
FIG. 27
Pour oil little by little when the stanchions
are fully down and then pump with the
crown so as to have a better filling.
Check that the oil level (H) is as required in
both legs.
HYDRAULIC CARTRIDGE
RE-ASSEMBLY (left leg)
FIG. 25
Push the stanchions up to slider bottom.
Fit the hydraulic cartridge (11) complete
with rebound spring (9) and bottom washer
(23, see exploded view) into the l.h. stan-
chion and push it fully down.

MXC
+
ECC
Air
Nm20
86
5
Nm12
6
34
11
Nm1,5
4
3
FIG. 29
Lubricate O-rings (5) in caps. Then lift
stanchions and fit caps (6) and (8) by
hands.
Tighten both caps to 20 Nm.
FIG. 28 (onlyleft leg)
Screw the cap (6) on hydraulic cartridge
end (11) unti it rests against the rod.
Lock check nut (34) on cap to the specified
torque.
FIG. 30 (left leg only)
Set rebound limiting knob (4) on RH leg
adjuster and tighten screw (3) to the torque
of 1,5 Nm.

MXC
+
ECC
Air
SPECIFIC MARZOCCHI TOOLS
Ref. Item. Description and use
AR 5089 AB Slider protector: to remove the oil seal from the slider
BR 5090 Oil seal press: to press oil seal into the slider
CR 4008/C Inflating pump
D5321038 Adapter fitting
ER 5085 Hexagon wrench: to set rebound adjuster
A
B
D
C
E