NLB 1012D - Section 9 - PARTS

Revision 6
Note:
Refer to Section 9: PARTS for breakdowns and parts lists for the following
procedures:
To completely dismantle the power end, the coupling or sheave must be removed
from the crankshaft.
If the pump is equipped with a gear-pac, the main gear must
be removed.
1. Drain the oil from the high pressure pump crankcase.
2. Disconnect each Plunger (Item #17) from the Crosshead Stubs (Item #31 ). Push the
plungers into the fluid end (Refer
to Section 8./1.A.l.a.: Plunger Packing and Stuffing
Boxes).
3. Remove the Splash Deflectors (Item #33). Remove crosshead stub deflectors, if so
equipped.
4. Dislodge the Crosshead Stub Seal Flanges (Item #36) by pulling from frame bore, after
removing each Crosshead Stub Seal Flange Bolt (Item #34) and Crosshead Stub Seal
(Item #35).
If needed to facilitate removal, screw two (2) 3/8" (9.5 mm) eye bolts into
the tapped holes in the cap.
5. Remove each Crosshead Stub (Item #31) by unscrewing it from crosshead. A moderate
amount of resistance will be experienced when unscrewing the stub because a medium
strength anaerobic adhesive
is used on the threads during assembly to minimize the
chance of this joint loosening during operation.
6. Remove the Crankcase Inspection Plate (Item #13).
7. Disconnect the Connecting Rods (Item #21) from the Crankshaft (Item #26) by
removing the connecting rod bolts, caps and rod bearings.
Push each rod and crosshead
assembly as far as possible toward the fluid end. Keep each bearing with each cap,
if
the bearings are in good condition, so they can be assembled in the same position. Match
the set numbers (1,2,3, etc.) stamped on the rods and caps when assembling.
© Copyright October, 2001 NLB Corporation 8-29