3.
Make sure that the bushing is in place in the
tilt cylinder mount on the mast. Line up the tilt
cylinder rod end and insert the front tilt
cylinder pin. Install the retainer washer, lock
washer and metric screw. Repeat for opposite
side.
4.
Connect the hydraulic lines to the mast. Make
sure the arrow on the lowering control points
down. Close the manual lowering valve on
the manifold.
5.
Install the carriage if it was not installed during
mast assembly.
6.
Check for proper tilt angle. Operate the mast
and check for leaks and proper operation.
Check the lift chains as described in Checks
and Adjustments. Adjust the brass set screws
as described in Checks and Adjustments.
Center (Free-Lift) Cylinder
Repacking
1.
Place a pallet or blocks under the forks and
lower the carriage completely. Disconnect the
free-lift chains and auxiliary attachment
(sideshift) hoses from the carriage.
2.
Lift the center cylinder clevis head out of the
cylinder rod and set it aside. If oil is present
inside the hollow tube, there is a leak between
the piston and the tube (refer to Figure 7.2).
3.
Use a spanner wrench to remove the gland
nut. Replace the O-rings, back-up rings,
wiper, and seal.
4.
Install the gland nut on the cylinder and torque
to 350 to 400 lb-ft.
5.
Place the clevis head into the center cylinder
rod. Connect the chains and hoses to the
carriage.
6.
Bleed the center cylinder.
Removal
1.
Raise and support the carriage.
2.
Put a drain pan under the area of the
hydraulic fittings. Disconnect the tube from
the cylinder.
3.
Remove the snap ring at the bottom of the
cylinder and the cylinder strap. Remove the
cylinder.
Installation
1.
Set the cylinder in the mount bracket in the
inner rail. Install the cylinder strap and the
snap ring.
2.
Connect the tube to the cylinder port.
3.
Lower the carriage.
E
lectric
C
ounterbalance
H
igh
O
utput
Elevating
3/10/00
7.8
1
2
3
4
5
6
7
8
1. Wiper
2. Rod Seal
3. Gland
4. Back-up Ring
5. O-Ring
6. Rod Assembly
7. Wear Ring
8. Cylinder Shell
FIGURE 7.6 - CENTER CYLINDER
