2000/06/01 Caterpillar

Caterpillar Products:

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175-7938 Hydraulic Wrench (3/4 inch)

175-7939 Hydraulic Wrench (1 inch)

175-7940 Hydraulic Wrench (1 1/2 inch)

175-7941 Hydraulic Wrench (1 1/2 inch)

175-7944 (115 Volt) Electric Hydraulic Pump

175-7945 Hand Pump

175-9412 (230 Volt) Electric Hydraulic Pump

Features/Benefits

• Use the hydraulic wrench when removing or installing bolts.

• The hydraulic wrench eliminates the use of torque multipliers.

• Use with economical single acting 10,000 psi hydraulic pump

• The hydraulic wrench requires only one hydraulic hose.

• The hydraulic wrench and the hydraulic pump are CE compliant (except 175-7944).

Hydraulic Wrenches

When you operate the wrench, use good quality sockets. Two pressure to torque conversion charts are included with the wrench. A pressure to torque converstion chart is attached to the hydraulic wrench. The wrench includes a plastic laminated sheet with pressure to torque conversions.

Hydraulic Pumps

The hydraulic pump includes a hydraulic gauge. The pump includes a 68,950 kPa (10,000 psi) hose.

Show/hide table

Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.

Use a hose that is rated 68,950 kPa (10,000 psi). Hoses which have a rated capacity below the rated pressure of the hydraulic pump can burst.

Socket drive accuracy ... +/- 3%

Pump operating pressure ... 68.950 kPa (10,000 psi)

Hydraulic Wrench Torque Range

175-7938 Wrench ... 247 to 1641 N·m (182 to 1210 lb ft)

175-7939 Wrench ... 546 to 4047 N·m (403 to 2985 lb ft)

175-7940 Wrench ... 1119 to 7593 N·m (825 to 5600 lb ft)

175-7941 Wrench ... 1641 to 11118 N·m (1210 to 8200 lb ft)

Square Drives

175-7938 Wrench ... 3/4 inch

175-7939 Wrench ... 1 inch

175-7940 Wrench ... 1 1/2 inch

175-7941 Wrench ... 1 1/2 inch

Hose Length

Electric Pumps ... 4.6 m (15 ft)

Hand Pump ... 1.5 m (5 ft)

Electric Hydraulic Pumps (Single Action)

Maximum flow per minute ... 6555 cc (400 in³)

Weight ... 26 kg (57 lb)

Gauge size ... 102 mm (4.0 inches)

Hose length ... 4.6 m (15 ft)

Manual Hydraulic Pumps (Single Acting)

Weight ... 2.3 kg (5 lb)

Gauge size ... 64 mm (2.5 inches)

Hose length ... 1.5 m (5 ft)

Illustration 1	g00713294
Typical Electric Hydraulic Pump

Illustration 2	g00713297
175-7945 Hand Pump

Illustration 3	g00713299
Typical Hydraulic Wrench