"3072ES / 3772ES / 3772ES HD" Service & Parts Manual October 2008
Page 3-7
STEER CYLINDER
There are two (2) cylinders utilized in the steering system. These cylinders are a double acting type
which requires fluid flow to operate the cylinder rod in both directions. During operation, the cylinders
should not leak, but a slight damping at the rod seal is acceptable. The pins should be checked for
wear.
To replace steer cylinder:
CAUTION: • Clean all fittings before disconnecting hoses.
• Tag hoses for proper reassembly.
• Plug all openings to prevent contamination.
1. Raise and support the front end of machine (see
Raising the Machine
).
2. Disconnect hydraulic hoses and cap them.
3. Remove the nut and bolt holding the steer cylinder to the motor mounting bracket.
4. Remove the pin and cotter pin holding the steer cylinder to the steer axle tie-rod.
5. Carefully lift off the steer cylinder.
6. Position the new steer cylinder and install pin and cotter pin to hold cylinder to the steer axle
tie rod.
7. Install nut and bolt to hold cylinder to motor mounting bracket.
8. Connect hydraulic hoses.
9. To purge air from cylinder;
• place a suitable container beneath the hose connections to catch spilled fluid,
• loosen hose fittings slightly,
• actuate steer function,
• when all air is purged, tighten hose connections.
Steer Cylinder Seal Replacement
Refer to
Section 1: Cylinder Repair
for seal replacement instructions.
Wheel Motor
Tie Rod
Motor
Housing
Pivot
Motor
Housing
Motor
Housing
Pivot
Steer Cylinder
ART_2569
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