Worksaver HPD-16 HSS, Owner'S And Operator'S Manual, Page: 24 / 42

23
SERVICE INSTRUCTIONS
(continued)
PHOTO L PHOTO M
PHOTO P PHOTO Q
MAINTENANCE AND
ADJUSTMENTS
(continued)
3. Remove the hydraulic cylinder from the carriage.
4. Remove the special 7/8" step nut from the cylinder
rod. Use a 1 1/2" wrench on the step nut and a 5/8"
wrench on the rod flats at the top of the rod.
5. Place the base end of the hydraulic cylinder in a vise,
support the upper end of the cylinder and remove the
aluminum cap assembly.
6. Carefully slide the aluminum cap assembly off the
upper end of the cylinder rod.
7. Pull the rod from the cylinder tube.
8. Remove the nut from the lower end of the cylinder
rod. The rod must be protected with leather, card-
board, or wood blocks and placed in a vise to remove
the nut. Remove the rod guide.
9. NOTE: It is advisable to install a new rod guide and
seal when rebuilding the cylinder. Inspect the cylinder
rod for pits and/or rust and replace if necessary.
CAP SEAL REPLACEMENT
Tools required:
2 1/8" wrench or 18" crescent wrench
Seal pick or small flat blade screwdriver
1 1/2" wrench or 12" crescent wrench
1 5/16" wrench or 12" crescent wrench
5/8" wrench or 12" crescent wrench
Anti-seize thread compound
The procedure for changing the seal is as follows:
1. The driver must be connected to the tractor/skid steer
for stability. The tractor engine turned off.
2. Lock the driver in the upper lock position by inserting
the transport lock pin through the bottom hole of the
driver ram (Photo L).
3. Remove the top lock nut from the rod using the
1 5/16" wrench and the 1 1/2" wrench on the step nut
(Photo M).
4. Lower the cylinder with the valve (Photo N).
5. Remove the step nut from the cylinder rod using the
1 1/2" wrench and the 5/8" wrench on the rod flats
(Photo 0).
6. Unscrew the top of the cap from the bottom of the cap
(Photo P). (2 1/8" wrench or 18" crescent wrench.)
7. Remove the old seal with a flat blade screw driver or
seal pick.
8. Install the new seal over the rod and start one edge
into the cap.
9. Carefully using a flat blade screw driver, gently work
the seal into the bottom of the cap (Photo Q).
10. Reinstall the top of the cap using approx. 50 FT/LB
of torque.
11. Never use any type of thread sealant on the threads
between the top cap and bottom gland of the cap and
seal assembly. This will destroy the aluminum
threads when trying to remove. Thread sealant is
only needed on the bottom threads of the cap (gland)
to the cylinder tube weldment.
12. Reapply anti seize on threads of rod.
13. Reinstall step nut to bottom of threads on rod.
14. Pull cylinder rod up to the driver mount plate and
reinstall top nut to approx. 80 FT/LB of torque.
15. The driver is now ready to drive posts.
PHOTO N PHOTO O