Graco Inc EM390 instruction manual Replacing the Drive Assembly, 55d 55a

REPLACING THE DRIVE ASSEMBLY

WARNING

To reduce the risk of serious bodily injury, including fluid injection or splashing in the eyes or on the skin, or injury from moving parts, always follow the Pressure Relief Procedure Warning on page 16 before checking, adjusting, cleaning or shutting off the sprayer. Unplug the power supply cord.

NOTE: Refer to Fig 21±1 for this procedure.

1.Remove the front cover (35). Remove the displace- ment pump. See page 18.

2.Remove the two screws (20). Pull the connecting rod and bearing assembly (C) off the crankshaft (D).

3.Remove the screws (55d and 55f) and pull the drive housing (A) off the motor housing (B).

4.Remove the screws (55c) and pull the motor housing

(B)off the motor (23).

5.Clean the gear (37) and inspect it for wear or damage. Replace if necessary. To remove, drive out the pin (27) and pull the gear off the motor shaft (E). Apply molybdenum disulfide spray lubricant to the gear, al- low to dry, then apply industrial-grade, heavy-duty, extreme-pressure, lithium-soap grease.

6.Install the new drive assembly in the reverse order of removal.

20

35

19

LUBRICATE AS 23

EXPLAINED IN STEP 5	E
	27
	37
55f
55e
55b
55c
D

C

18

			B
		A
55d	55a
			LO-BOY SPRAYER

	113
	55a
55d	UPRIGHT SPRAYER

Fig 21±1 0674

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