Hydraulic Hand Pump
Care and Maintenance
Page 20
6. Place the Handle #10 so it is centered on the Piston Assembly #2 then push the Piston Assembly #2 to
the bottom of the Sealant Barrel #3.
Place Handle #10 in the clean area.
NOTICE: be very careful not to scratch or score the inside of the Sealant Barrel #3.
7. Carefully place the Pump Body Assembly #4 into a pipe vise in a vertical position with the Sealant Barrel
#3 up and loosen the Sealant Barrel #3 using a chain wrench or a pipe wrench. Close the By-Pass Valve
#7 then completely remove the Sealant Barrel #3.
IMPORTANT: when removing the Sealant Barrel #3
notice the grove for the Barrel O-
Ring #3B at the end of the Sealant Barrel #3. We will later refer to this as the o-ring end
and the opposite end as the head assembly end.
CAUTION: using the Handle #10 to twist the Pump Body Assembly #4 will damage the
Hydraulic Hand Pump.
8. Remove the Pump Body Assembly #4 from the pipe vise and place the Sealant Barrel #3 into the pipe
vise.
Stand the Hydraulic Hand Pump on the Fluid Barrel Cap #14 in a safe place where it will not fall
or get knocked over.
9. Using the Handle #10 push the Piston Assembly #2 out of the Sealant Barrel #3 enough so you can grab
it and pull it out with your hand.
10. Clean and return the Handle #10 to the clean area.
11. While holding the Piston Body #2F using a pin spanner, remove both Washer Nuts #2D using a face
spanner.
12.
Remove and discard the Inner Leather Cup #2H and the Nylon Piston Cup #2E.
13. Replace the Piston O-Ring #2G.
14. While holding the Piston Body #2F with the Cap Screw #2A up place the Nylon Piston Cup #2E on top
and the Inner Leather Cup #2H on the bottom of the Piston Body #2F.
15. Screw a washer nut #2D to each end of the piston body #2F.
16. Tighten the Piston Assembly #2 using the spanner wrenches.
17. Rub a thin coat of hydraulic fluid over the outside of the Inner Leather Cup #2H.
18. Place the Piston Assembly #2 with the Inner Leather Cup #2H into the head assembly end of the Sealant
Barrel #3.
Slowly work the Inner Leather Cup #2H into the Sealant Barrel #3 and avoid damaging it.
NOTICE: you may need to tap gently on the edge of the Inner Leather Cup #2H using a
ball peen hammer to assist in working it in. The leather will regain its shape when soaked
with hydraulic fluid.
