Hitachi 231327 manual Pinion Housing, Repairing the Pinion

Pinion Housing

6	1	The back of the pinion housing (19a).
1	2	Slide the pinion assembly in here.

	19k	3
2
		4
1.45 in		5
19n 19b 19p		6

19m**

3	19c		19h** 4
	19d		19g** 5
	3	19e	19a

Fig. 10

Lubricate the exterior.

Lubricate the inner and outer diameters.

Lubricate the teeth.

This is a cutaway view of the pinion housing (19a).

19j**

03475A

Repairing the Pinion

NOTE: Refer to Fig. 10 except where noted.

NOTE: A hydraulic press is required if you purchase the pinion parts individually. Otherwise, use Repair Kit No. 240162, which includes the shaft and bearings pre–assembled and lubricated.

If using Repair Kit 240162, follow Steps 1 to 5, below.

If purchasing parts separately, use these instructions. Disassemble as far as needed for the parts being replaced.

NOTE: The old bearing (19h) will be damaged when removed. Have an extra bearing on hand if you need to remove it for any reason.

1. Remove the small ring (19m) from the hub (19j).

1.Remove the small ring (19m**) from the hub (19j) and the large ring (19k) from the bearing recess of the pinion housing (19a).

2.Push on the front of the shaft (19g**) to force the bearing and hub assembly out of the housing (19a).

3.Install the new shaft assembly into the pinion housing; push it to the shoulder of housing (19a).

4.Install the ring (19k) and then the ring (19m**).

5.Go to Reassembly, page 25, step 7., or continue on page 20.

2.	Remove the snap ring (19k) from the bearing
	recess of the pinion housing (19a).
3.	Push on the front of the shaft (19g) to force the
	bearing (19h) and hub (19j) assembly out of the
	housing.
4.	Using a hydraulic press, place pieces of steel
	bar stock on the inner race of the large bearing
	(19h) and press the shaft through the hub and
	bearing. See Fig. 11.
5.	Apply lubricant to the parts as shown in Fig. 10.
6.	Press fit the following parts: Large bearing (19h) to
	the large shoulder of the shaft (19g). Hub (19j)

APlace the steel blocks as shown to press off the large bearing (19h).

BHydraulic press

CUse a round steel bar to push on the shaft (19g)

DPosition two steel bars as shown (front bar not shown).

EPosition two steel bars as shown.

FPlatform of hydraulic press

Fig. 11

B

F

C

19j

19h

D

E

03499A

	onto the shaft (19g) all the way to the large bearing
	(19h).
7.	Install the shaft assembly, pushing it to the shoul-
	der of the housing (19a).
8.	Install the snap ring (19k). Install the small ring
	(19m).
9.	Go to Reassembly, page 25, step 7., or continue
	on page 20.

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