8
12. Lubricate weep seal (36). Place, weep seal (36), and pressure ring (36A)
into the seal sleeve (35). Assemble the o-ring (35A and 35B for LP255
only) onto seal sleeve and lubricate.
14. Press seal sleeve assembly into
the manifold and seat firmly.
Put the support ring (41) on
plunger with v-side facing the
manifold.
15. Place entire manifold/seal
sleeve assembly over the studs
and push firmly until seated
against the crankcase.
18. Replace plug with o-ring (48, &
48A) and tighten to 160 ft.-lbs.
13. For LP255 pumps, insert sup-
port ring (37) into valve casing
(43). Place support ring (41) and
v-sleeves (40) into valve
casing.
17. Next, place valve assemblies
(46A) into manifold after first
lubricating the o-ring (44A). Seat
firmly into manifold.
16. Tighten hex nuts (49A) in a
crosswise pattern (shown
above) to 60 ft.-lbs.
19. Fill crankcase with approxi-
mately 116 fluid ounces of Gi-
ant oil or equivalent SAE 90
industrial gear oil and check oil
level of the crankcase with the
dipstick. Proper level is center
of two lines. Reinstall your Gi-
ant LP pump into your system.
Contact Giant Industries or your local distributor for maintenance
of the gear end of your pump. Phone: 419/531-4600
Contact Giant Industries for service school information. Phone: (419) 531-4600
36A
36
35
35A
35B (LP255 only)
39
6
4
2
7
8
1
3 5
LP122A Series/LP123/LP255 - Repair Instructions
