Mec 3072RT - Steer Cylinder Service

March 2008 "3072RT / 3772RT / 3772RT HD" Service & Parts Manual - ANSI Specifications
Page 3-6
Wheel Motor
Tie Rod
Motor
Housing
Pivot
Motor
Housing
Motor
Housing
Pivot
Steer Cylinder
Steer Cylinder
There are two (2) double acting type steer cylinders on this machine. During operation,
cylinder(s) 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 ).
1. Disconnect hydraulic hoses and cap them.
2. Remove the nut and bolt holding the steer cylinder to the motor mounting bracket.
3. Remove the pin and cotter pin holding the steer cylinder to the steer axle cross member
(tie-rod).
4. Carefully lift off the steer cylinder.
5. Position the new steer cylinder and install pin and cotter pin to hold cylinder to the steer
axle cross member.
6. Install nut and bolt to hold cylinder to motor mounting bracket.
7. Connect hydraulic hoses.
8. To purge air from cylinder;
• place a suitable container beneath the hose connections to catch spilled oil,
• loosen hose fittings slightly,
• actuate steer function,
• when all air is purged, tighten hose connections.
Steer Cylinder Seal Replacement
Refer to Section 1 for seal replacement instructions.