Performance Tool M637 User Manual

1/4 IN. DR. MINI AIR RATCHET
OWNER’S MANUAL
Stock Number M637
SPECIFICATIONS:
Square Drive (IN.).....................................1/4
Working torque (FT./LBS) .............................5-12
Air pressure (P.S.I.) ...................................90
Average air consumption (C.F.M.) .........................4
Free speed (R.P.M.) ..................................250
Bolt capacity (IN.) ....................................5/16
Air inlet (N.P.T.).......................................1/4
Hose size (I.D.)....................................3/8 in.
Weight (LBS) ........................................1.2
Specifications are subject to change without notice.
WARNING!
READ, UNDERSTAND AND FOLLOW ALL INSTRUCTIONS AND
WARNINGS BEFORE OPERATING THIS TOOL. FAILURE TO DO
SO MAY RESULT IN PERSONAL INJURY AND/OR PROPERTY
DAMAGE AND WILL VOID WARRANTY.
REPLACEMENT PARTS
INDEX DESCRIPTION QTY INDEX DESCRIPTION QTY
1 Housing 1
2 Anvil Bushing 1
3 Trigger 1
4 Trigger Pin 1
5 O-ring 1
6 O-ring 1
7 Valve Stem 1
8 Spring 1
9 Air Regulator 1
10 O-Ring 1
11 O-Ring 1
12 Nut 1
13 Muffle Cover 1
14 Air Inlet 1
15 Bearing 1
16 End Plate 1
17 Set Pin 2
18 Rotor 1
19 Rotor Blade 4
20 Cylinder 1
21 Rotor Spacer 2
22 Front Plate 1
23 Set Pin 1
24 Bearing 4
25 Thread Ring Gear 1
26 Planet Gear 3
27 Gear Pin 3
28 Gear Plate 1
29 Clamp Nut 2
30 Bushing 1
31 Ratchet Housing 1
32 Needle Bearing 1
33 Crank Shaft 1
34 Drive Bushing 2
35 Ratchet Yoke 1
36 Reverse Knob 1
37 Spring 2
38 Lock Pin 2
39 Washer 1
40 Ratchet Anvil 1
41 Spring 2
42 Steel Ball 2
43 Pin 1
44 Thrust Washer 1
45 "C" Retainer Ring 1
46 Spring 1
47 Steel Ball 1
48 Ratchet Pawl 1
© Copyright 2017 WILMAR CORPORATION,
P.O. Box 88259 Tukwila, WA 98138

Performance Tool M637 Specifications

General

Brand	Performance Tool
Model	M637
Category	Power Tool
Language	English

Summary

Product Specifications

Square Drive

Specifies the drive size of the ratchet, which is 1/4 inch.

Working Torque

Indicates the recommended torque range for the tool, from 5 to 12 FT./LBS.

Air Pressure

Specifies the recommended operating air pressure at the tool, 90 P.S.I.

Average Air Consumption

Details the average air usage in CFM, rated at 4 C.F.M.

Free Speed

States the maximum rotational speed of the tool, 250 R.P.M.

Bolt Capacity

Indicates the maximum bolt size the tool is rated for, 5/16 inch.

Air Inlet

Specifies the size of the air inlet connection, 1/4 N.P.T.

Hose Size

Recommends the minimum inside diameter for the air hose, 3/8 inch.

Weight

Provides the total weight of the tool, 1.2 LBS.

Safety Information

General Safety Precautions

Outlines essential safety rules for operating air tools, including proper usage, PPE, and work area safety.

Tool Handling and Connection

Details safe practices for connecting, disconnecting, and handling the air tool and its accessories.

Overloading and Maintenance

Warns against overloading the tool and advises on regular inspection of hoses and fittings.

Air Source and Operation

Air Supply Requirements

Explains the importance of clean, correct air pressure and dry air supply for optimal tool performance.

Operating Instructions

Provides steps for using the air ratchet, including throttle control, forward/reverse selection, and socket usage.

Troubleshooting

Insufficient Power Issues

Identifies common causes for low power and provides solutions such as cleaning air passages or checking for leaks.