TM 10-4610-240-24
TM 0850C-24/2
TO 40W4-13-22
4-2. R. O. PUMP ASSEMBLY POWER END MAINTENANCE - continued.
DISASSEMBLY
a. Drain oil from power frame (13) and remove screws (1) and cover (2)
b. Disconnect plungers (8) from crossheads (23) by unscrewing coupling nuts (9).
c. Loosen gland nuts (12), using gland nut adjustment tool and push plunger into the fluid cylinder (10) for
clearance
d. Remove crosshead stub deflectors (7)
e. Remove bolts (6), stub seal caps (5), seals (4) (two per cap) and gaskets (3).
f. Remove oil level indicator (21), tee (20) and nipple (19).
NOTE
If bearings are to be reused, mark bearings to ensure reinstallation on same connecting rod.
Caps are pre-marked 1, 2 and 3 to correspond with like marks on connecting rod
h. Disconnect connecting rods (27) from crankshaft (31) by removing the connecting rod bolts (26), caps (25) and
bearings (24). Push rods and crossheads (23) as far as possible into the fluid cylinder (13) for clearance
NOTE
Keep shims, if used, together with end cap for reassembly. If original crankshaft and/or
bearings are to be reinstalled, shims should indicate correct end play. If any components
were replaced, end play adjustment may be required during assembly.
i. Remove bolts (18 and 37), end caps (17 and 36) and shims (16 and 35).
NOTE
Crankshaft may be removed from either end of pump assembly. Bearing cup (15 or 33),
depending on how crankshaft is removed, will come off with crankshaft
j. Remove crankshaft (31) and bearing cup (15 or 33)
k. Remove remaining bearing cups (15 or 33) and seal (34)
NOTE
To remove bearing cones, use an arbor press or heat cones to 300 F at inner race.
l. Remove bearing cones (14 and 32)
4-2
