Toro Groundsmaster 7210, Service Manual

Page: 193 / 342

Assembling the Polar Trac Lift Cylinder (continued)
B. Carefully install the back-up ring, O-ring, seal, and wiper to the head.
IMPORTANT
Clamping the vise jaws against the rod surface could damage the
rod. When securing the rod in a vise, clamp the rod clevis only.
3. Mount the rod correctly in a vise by clamping on the clevis of the rod, and
do the following steps:
A. Put a coating of clean hydraulic fluid on the rod.
B. Slide the head onto the rod.
C. Install the piston onto the rod and attach the piston with the locknut;
torque the locknut to 339 to 406 N∙m (250 to 300 ft-lb) .
D. Remove the shaft assembly from the vise.
IMPORTANT
When you clamp the hydraulic cylinder in a vise, clamp the clevis
end of the cylinder head only to prevent damage.
4. Mount the cylinder head correctly in a vise by clamping on the clevis end
of the cylinder head.
IMPORTANT
When installing the head into the cylinder head, pay careful attention
to the retaining ring slot in the cylinder head to ensure that the
piston and head seals do not lodge in the slot.
5. Put a light coating of clean hydraulic fluid on all internal parts. Slide the
piston, shaft, and head assembly into the cylinder head.
Note: Do not damage the seals.
6. Install the retaining ring and insert the head in the cylinder head. Align the
retaining ring hole in the head with the access slot in the cylinder head. Insert
the retaining ring hook into the hole and rotate the head clockwise until the
retaining ring is completely pulled into the cylinder head and the ring ends
are covered.
Groundsmaster 7210 Page 4–133 Hydraulic System: Service and Repairs
16222SL Rev C