GEAR REDUCER SERVICE (Model 2040)

WARNING

To reduce the risk of serious bodily injury, including fluid injection, splashing in the eyes or on the skin or injury from moving parts, always follow the Pressure Relief Procedure Warning on page 2 before proceeding.

Replacing the Gasket (9)

NOTE: To maintain a good seal, the gasket must be replaced whenever the gear reducer is disassembled.

1.Remove the four bolts, lockwashers and washers. Pull the pump and gear reducer assembly off the engine.

2.Drain the gear reducer oil by placing a container under it and removing the drain plug with a 22 mm wrench. Replace the o±ring (15) if damaged.

3.Remove the nine screws with a 6 mm wrench and pull the gear case off the gear cover.

4.Remove the old gasket (9). Clean the gear cover and case surface. Lightly coat the new gasket with grease and install it in on the gear case.

5.Follow steps 5 through 7 under Assembling the Gear Reducer if this is all the service required.

Replacing the Oil Seal (14)

NOTE: The oil seal MUST be replaced if removed.

1.Follow steps 1 and 3 under Replacing the Gasket.

2.Remove the snap ring (6) from the gear case, using a snap ring pliers. Pull the gear and bearing.

3.Push the seal from the inside to the outside of the gear case by placing screwdriver against the seal and lightly tapping it with hammer.

4.Wipe the inner surface of the case clean, then lightly coat it with grease. Place the oil seal into the gear case. Use a socket, placed against the surface of the seal, to push the seal into the case until its top surface is past the ridge in the bore.

5.Place the gear and bearing back into the gear case and install the snap ring (6).

6.Follow steps 4 through 7 under Assembling the Gear Reducer if this is all the service required.

Replacing the Oil Seals (21)

1.Follow steps 1 through 3 under Replacing the Gasket.

2.Loosen the setscrew, using a 4 mm wrench, and pull the gear (4) off the pump with a gear puller.

3.Using a 6 mm wrench, remove the four screws. Keep them separate from the other nine screws removed previously.

4.Remove the four oil seals (21) and replace them.

5.Follow steps 2 through 7 under Assembling the Gear Reducer if this is all the service required.

Replacing the O±Ring (1)

1.Follow the instructions under Replacing the Gasket and Replacing the Oil Seals to disassemble the gear reducer.

2.Pull the gear cover off the pump and replace the o±ring (1).

3.Follow instructions under Assembling the Gear Reducer if this is all the service required.

Assembling the Gear Reducer

1.Grease the o±ring and make sure it's properly placed on the gear cover.

2.Place the four oil seals and screws in the gear cover. Place the o±ring on the screw to hold it in the cover.

3.Apply low strength Loctiter (blue) on the screw threads, align the screws with the holes in the pump, and tighten the screws oppositely and evenly.

4.Grease the pump shaft. Align the gear's slot with the key on the pump shaft and slide the gear onto the shaft, up to the pump's shoulder. Apply low strength Loctiter on the setscrew threads and tighten the setscrew to lock the gear on the shaft.

5.Make sure the gasket is in place (refer to step 4 under Replacing the Gasket). Install the gear cover on the case, aligning the holes, and secure it with the nine screws and lockwashers. Tighten the screws evenly in a crisscross pattern.

6.Grease the engine shaft. Align the gear's slot with the key on the engine shaft and slide the gear reducer onto the shaft, up to the engine's shoulder.

7.Secure the gear reducer to the engine with the four bolts, lockwashers and washers.

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Graco Inc 800-672, 308-523, 800-674, 800-671, 800-670 manual Replacing the Oil Seals
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