TM 10-4610-310-14
0127 00
DISASSEMBLY-REMOVED
4. Completely drain the oil from the gearbox crankcase into a suitable container. See Figure 1.
Place gearbox (1) on work surface with pinion oil seal (7) facing up.
5.
6. Remove pinion oil seal (7).
7. Remove outer retaining ring (6) in groove below pinion oil seal (7).
8. Remove pinion gear (3). Place gearbox on housing (2) flange. Press ball bearing (4) out from inside gearbox
housing (2).
9. Remove ball bearing (4) from pinion gear (3).
10. Remove inner retaining ring (5).
11. Set pinion gear (3), ball bearing (4), and inner retaining ring (5) aside for reassembly.
12. Remove retaining screw with lock washer (9) and flat retaining washer (10) from spur gear (12).
ASSEMBLY
Bearing Cover Flange
1. Align the four holes and mount gasket (15) on outside of bearing cover flange (14).
2. Replace O-ring (13) in outer groove of bearing cover flange (14).
CAUTION
Keep raise threaded mounting holes to front top and bottom rear. Proper assembly is
necessary.
3. Install bearing cover flange (14) onto plunger pump flush with pump crankcase.
4. Install four socket Allen head screws (17) and toothed washers (16).
5. Torque screws 50 inch-pounds (5.6 N m).
Gearbox
1. Insert key (11) into pump crankshaft keyway.
2. Examine spur gear (12) for wear. Replace spur gear if necessary.
CAUTION
Make sure long neck is installed toward pump crankshaft. Proper assembly is necessary.
3. Align keyway of spur gear (12) with key (11) in pump shaft.
4. Install flat washer (10) and retaining screw with lock washer (9) onto shaft.
5. Torque the retaining screw 110 inch-pounds (12.3 N m).
6. Examine two gearbox crankcase housing (2) oil drain plugs (21) for any evidence of leaking.
7. Replace two O-rings (22) if necessary.
8. Examine pinion gear (3) teeth for wear. Replace pinion gear if necessary.
9. Press ball bearing (4) over pinion gear (3) until seated on shoulder.
10. Install inner retaining ring (5) on pinion gear (3). Snap ring into groove.
11. Install pinion gear (3) and gear assembly into gearbox housing (2). Press into position until seated on
shoulder.
0127 00-2
