Hitachi 231327 manual Bearing Housing & Connecting Rod, Model 231326 Shown

Bearing Housing & Connecting Rod

WARNING

INJECTION HAZARD

To reduce the risk of serious injury, whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 10.

NOTE: Steps 1 to 13 refer to Fig. 7.

1.Relieve pressure.

2.Remove the screws (68) and the front cover (23).

3.Remove the spring clips (112, 114) and the drain hose (113). Unscrew the suction tube (30) from the pump, holding a wrench on the pump intake valve

(B)to keep the pump from loosening.

4.Disconnect the pump outlet hose (59) from the displacement pump outlet nipple (87).

5.Use a screwdriver to push up the retaining spring (26) at the top of the pump. Push the pin (25) out the rear.

6.Loosen the jam nut (27) with an adjustable wrench. Unscrew and remove the displacement pump.

7.Use a hex key wrench to remove the four screws (73) and lockwashers (74) from the bearing hous- ing (21).

8.While pulling the connecting rod (22) with one hand, lightly tap the lower rear of the bearing housing (21) with a plastic mallet to loosen it from the drive housing (20). Pull the bearing housing and the connecting rod assembly (22) off the drive housing.

9.Inspect the crank (A) for excessive wear and replace parts as needed.

10.Evenly lubricate the inside of the bronze bearing

(C)in the bearing housing (21), and the inside of the connecting rod link (D), with high–quality motor oil (do not use grease). Liberally pack the roller bearing (E) in the connecting rod assembly (22) with bearing grease.

11.Assemble the connecting rod (22) and bearing housing (21).

12.Clean the mating surfaces of the bearing and drive housings.

13.Align the connecting rod with the crank (A) and carefully align the locating pins (F) in the drive housing (20) with the holes in the bearing housing (21). Push the bearing housing onto the drive housing or tap it into place with a plastic mallet.

CAUTION

DO NOT use the bearing housing screws (73) to align or seat the bearing housing with the drive housing. These parts must be aligned using the locating pins (F), to help avoid premature bearing wear.

14.Install the screws (73) and lockwashers (74) on the bearing housing. Tighten evenly to 40 "5 ft-lbs (54 "7 N￿m).

15.Refer to Installing the Pump on page 31.

1 Torque the screw to

40 "5 ft-lbs (54 "7 N￿m). 20

A

E

D

22

C

74

173

		F
		21
	25	26
23	27	59

68

		87
	112
	113	B
		30
	114	Model 231326 Shown
Fig. 7		03472

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