To Check Valves

LP301A-5100 REPAIR INSTRUCTIONS

NOTE: Always take time to lubricate all metal and non-metal parts with a light film of oil before reassembling. This step will help ensure proper fit, at the same time protecting the pump non-metal parts (elastomers) from cutting and scoring.

1)Loosen and remove tension plugs (48) with a 36mm socket wrench.

46C

46A

46B

46D

44B 44A 45

2)Remove the support ring (44B), o-ring (44A) and ten- sion spring (45).

3)Take out discharge valve as- semblies (46) by pulling them upwards out of the valve casing (43) with a snap-ring tongs or any other pull-off device. Then re- move inlet valves in the same way.

4)Loosen valve seats (46A) and valve spring (46C) from spacer pipe (46D) by lightly hitting the valve plate (46B) with a plastic stick. Check sealing surface and replace worn parts. Reassemble with new o- rings (44A) if possible and oil them before installing.

5)Tighten up tension plugs

(48)to 107 ft.-lbs.