GEAR REDUCER SERVICE (Model 1535)

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 O–Ring (5)

1. Remove the four bolts, lockwashers and washers. Pull the pump and gear reducer assembly of f 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 (16) if damaged.

3.Remove the four screws and lockwashers with a

6 mm wrench and pull the gear case of f the gear cover.

4.Remove the old o–ring (5). Clean the gear cover and case surface. Lightly coat the new o–ring with grease and install it in the gear case.

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

Replacing the Gasket (1)

1.Follow steps 1 through 3 under Replacing the O–Ring.

2. Using a 4 mm wrench, remove retaining bolt, lockwasher, flat washer and pull the gear (4) off the pump with a gear puller.

3.Remove the four screws and lockwashers from the gear cover.

4.Remove the gear cover and gasket (1) from the pump. Clean the gear cover and pump surface. Lightly coat both sides of the gasket with grease and install it on the gear cover.

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

Replacing the Oil Seal (10)

NOTE: The oil seal MUST be replaced if removed.

1.Follow steps 1 and 2 under Replacing the O–Ring.

2.Pry the oil seal out of the gear case. Be careful not to damage the gear case.

3.Wipe the inner surface of the gear 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.

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

Assembling the Gear Reducer

1.Make sure the gasket is properly placed on the gear cover. Refer to step 4 under Replacing the Gasket. Then, install the gear cover on the pump shaft.

2.Align the holes in the gear cover with the holes in the

pump. Apply low strength Loctite r (blue) on the screw threads and secure the cover with the four screws and lockwashers. T ighten them oppositely and evenly.

3.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. Tighten the retaining bolt, lockwasher and flat washer to lock the gear on the shaft.

4.Make sure the o–ring is in place. Refer to step 4 under Replacing the O–Ring. Install the gear case on the cover, aligning the holes, and secure it with the

four screws and lockwashers. T

ighten them

oppositely and evenly.

 

5.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.

6.Secure the gear reducer to the engine with the four bolts and lockwashers.

16308–530

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Graco Inc 800-700, 800-699 Gear Reducer Service Model, Replacing the O-Ring, Replacing the Gasket, Replacing the Oil Seal
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800-700, 308-530, 800-698, 800-699 specifications

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The Graco 800-699 is a versatile air-operated double diaphragm pump designed for high efficiency and reliable performance. Its robust construction includes a corrosion-resistant housing ideal for handling tough fluids. The pump can effectively operate at various pressures, making it suitable for tasks ranging from transferring chemicals to applying coatings. With its easy maintenance design, operators can quickly access key components, minimizing downtime.

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Collectively, these Graco models embody a commitment to quality, durability, and user-friendly design, allowing companies to streamline their processes and enhance productivity in fluid handling tasks. With ongoing advancements and a focus on customer satisfaction, Graco Inc continues to be a leader in this industry.
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