1900 YRM 1018 Hydraulic Cylinder
7. Drive the roll pin retaining the top clevis pin out of
the frame and clevis pin. Remove the top clevis pin.
8. Remove the roll pin retaining the bottom clevis pin.
Remove the bottom clevis pin and the hydraulic
cylinder.
REPACKING
CAUTION
Lubricate the seals, packing, and O-rings with clean
hydraulic oil before assembling. Make certain to
install spacers, if any were removed.
CAUTION
Make certain that none of the sealant gets into the
cylinder. Allowing sealant to get into the hydraulic
system may cause damage to the components
within the hydraulic system.
1. Move the cylinder toward the rear of the truck.
Loosen the gland nut. Extract the piston, gland
nut, and rod from the cylinder.
2. Disassemble the nut and piston from the cylinder
rod. Remove the spacers, if used, and slide the rod
out of the gland nut.
3. Replace all seals, packing, and O-rings.
4. Install the seals, packing, and O-rings as necessary
into the gland and piston after coating them with
clean hydraulic oil.
5. Carefully install the rod through the gland nut. In-
stall the piston, spacer (if necessary), and the lock
nut. Tighten the lock nut (lubricated) to 150 N•m
(110 lbf ft).
6. Carefully install the rod assembly into the cylinder.
Apply Loctite
®
242 or equivalent to the threads of
the gland nut. Tighten the gland nut to 27 N•m
(20 lbf ft).
INSTALL
WARNING
Be careful when removing or installing snap rings.
The snap rings can come loose during removal or
installation with enough force to cause a personal
injury. Always use the correct snap ring pliers and
wear eye and face protection during removal and
installation.
1. Align the bottom of the cylinder with the frame and
install the bottom clevis pin.
2. Install the roll pin to retain the clevis pin.
3. Alignthetopofthecylinderrodwiththeframeand
install the top clevis pin. Install the roll pin to retain
the clevis pin.
4. Assemble the frames. Refer to the section Frame
100 YRM 1015.
5. Remove the blocks and lower the lift truck to the
floor.
6. Remove the breather and add the recommended
hydraulic oil until the oil is up to the full mark.
Replace the breather. If too much hydraulic oil is
added, the oil will leak from the breather during
operation. If too much oil has been added, drain
the excess or use a suction device to remove some
of the oil.
7. Run the pump for 5 seconds and energize the low-
ering valve at the same time so that oil gets through
the pump body and valve at 0.0 psi. Operate the
forks up and down three or four times to remove air
from the system. Operate the lift truck until the hy-
draulic oil reaches operating temperature. Check
the hydraulic oil level. If necessary add additional
oil. Check for hydraulic oil leaks.
8. Install the drive unit compartment cover. Test the
operation of the lift truck prior to returning the truck
to service.
9
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