YSM40R_Mainte_E.pdf - 第152页

3-82 3 Periodic maintenance items n Detaching pressing plate and cup packing 1 Put a mark. Using an oil-based marker pen, put a mark on the pressing plate at the position of the mark on the casing. 533B2-N9-00 c CAUTION …

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3-81
3
Periodic maintenance items
5
Replace the O-rings.
1. Detach the connecting pipe from the
head covers.
2. Replace the O-rings (4 pieces) on the
connecting pipe with new ones. At this
point, apply grease (NSL) to the entire
surface of each new O-ring.
533A8-N9-00
6
Put a mark.
Before detaching the cylinder, put a mark
on the casing and cylinder with an oil-based
marker pen to indicate the reassembly
position.
533A9-N9-00
c
CAUTION
The pump will break down if the cylinder is reassembled
in the wrong direction, so always put a mark to indicate
the reassembly position.
7
Raise the cylinder.
Turning the fan raises the cylinder. Wear
gloves and slowly turn the fan to raise the
cylinder.
c
CAUTION
The inside of the pump might be hot. Always wear
gloves before touching the fan and cylinder.
8
Detach the cylinder.
c
CAUTION
Do not drop the spacer located on the inner periphery
of the cylinder installation surface.
533B1-N9-00
Step 5
Replacing the O-ring
Connecting pipe
Head cover
O-ring
Step 6
Marking
Oil-based marker pen
Step 7, 8
Detaching the cylinder
Cylinder
Fan
3-82
3
Periodic maintenance items
n
Detaching pressing plate and cup packing
1
Put a mark.
Using an oil-based marker pen, put a mark
on the pressing plate at the position of the
mark on the casing.
533B2-N9-00
c
CAUTION
The pump will break down if the pressing plate is
reassembled in the wrong direction, so always put a
mark to indicate the reassembly position.
2
Detach the pressing plate.
Always wear gloves and use a Phillips
screwdriver to loosen 4 mounting screws
(M5×L12) and detach the pressing plate.
Clean the detached pressing plate.
3
Detach the cup packing.
533B3-N9-00
n
Detaching cylinder parts
1
Detach the parts on the exhaust
valve side.
Use a Phillips screwdriver to loosen the
mounting screw and detach the exhaust
valve pressing plate, exhaust valve, and
exhaust valve backup.
533B4-N9-00
c
CAUTION
Do not dispose of the exhaust valve pressing plate and
intake valve pressing plate as they will be reused after
cleaning.
2
Detach the parts on the intake
valve side.
Invert the cylinder, loosen the mounting
screw with a Phillips screwdriver, and detach
the intake valve pressing plate, intake valves
(2 pieces), and intake valve backup.
533B5-N9-00
3
Clean the cylinder.
Using a lint-free cloth moistened with a
cleaning solvent, wipe the entire cylinder.
c
CAUTION
During cleaning, be careful not to erase the mark you
put on the cylinder.
Step 1
Marking
Oil-based marker pen
Step 3
Detaching cup packing
Cup packing
Step 1
Detaching exhaust valve
Exhaust valve
Exhaust valve pressing plate
Exhaust valve backup
Step 2
Detaching intake valve
Intake valves (2 pieces) Intake valve pressing plate
Intake valve backup
3-83
3
Periodic maintenance items
7.2.4 Attaching the replaceable parts
n
Attaching the cup packing and pressing plate
1
Place a new cup packing.
Place a new packing on the connecting
rod, with the sealing side facing down.
533B6-N9-00
2
Place the pressing plate.
Place the cleaned pressing plate on the cup
packing while aligning the mark with the
mark on the casing.
533B7-N9-00
3
Tighten the mounting screws.
1. Make sure the mark on the pressing plate
is aligned with the mark on the casing.
2. Use a torque limiting screwdriver to
tighten 4 screws (M5×L12) uniformly in a
diagonal order.
Tightening torque: 0.55 N·m
n
Attaching the cylinder parts
1
Reassemble the intake valve parts.
1. Place the two intake valves (FLAP) in the
cleaned cylinder and then place the
intake valve backup (SHEET1 FLAP) and
pressing plate on the intake valves.
2. Use a torque limiting screwdriver to
tighten the screw (M3×L5) to a torque of
0.55 N•m while being careful not to
make contact with the periphery of the
concave groove.
533B8-N9-00
2
Reassemble the exhaust valve parts.
1. Invert the cylinder, place the exhaust
valve on the cylinder, and place the
exhaust valve backup.
2. Place the pressing plate on the exhaust
valve, and use a torque limiting
screwdriver to tighten the screw (M3×L5)
while being careful not to make contact
with the periphery of the concave
groove.
Tightening torque: 0.55 N•m
3
Insert the cylinder.
Insert the cylinder in the cup packing
section while aligning the mark on the
cylinder with the mark on the casing.
Step 1
Placing a cup packing
Cup packing
Step 2, 3
Mounting the pressing plate
Mounting boltPressing plateTorque limiting screwdriver
Attaching cylinder parts
Tighten the screw so that the exhaust valve does not
make contact with the periphery of the groove.
Step 1