2
16.
Center the piston over the cylinder opening. Keeping it
level, re-install the piston into the cylinder.
NOTE:
If you don’t keep the piston level, it will be very hard
to get it back inside the cylinder.
17.
Place a block of wood or similar under the piston to hold
it up inside the cylinder.
NOTE:
Do not hold the piston up with anything that can
damage it.
18.
Remove both bolts (Part 3) out of the piston. Place the
bolts through the ring on the end of the return springs
(Part 4) and put them back into the piston. Tighten the
bolts.
19.
On the top of the machine, tighten both 3/8in nuts
(Part 1). Alternate tightening equally, about 1/2in of
thread each time until the nuts are tight and the piston
has been pulled all the way back into the cylinder.
20.
Check each bolt to see that you have an equal amount
of thread used on each nut rod.
21.
Re-tighten the hydraulic hose fitting on the flow control
valve.
CAUTION:
Do not over-tighten the hydraulic hose fitting.
Tighten it and then run the machine. Re-tighten
it until it stops leaking.
22.
Run the machine and check for leaks.
Call Gilson Technical Support with any questions or problems
at 800.444.1508
Repair Parts
Model
Description
Part Number
MC-250
6in o-ring
RPMC-250-4
6in backup o-ring
RPMC-250-18
3
4
2
1
3
4
FRONT VIEW HALF SECTION
2
1
Figure 1
