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7. Be sure both Air Port Gaskets are in good condition and are
installed, large open end rst, in the two air ports in the large
bore in the Motor Housing (1) before installing the motor in the
Motor Housing.
8. Align the dowel hole in each End Plate (14) and (20) with the
dowel hole in the Cylinder (19) and insert a 1/4” (6 mm) diameter
rod about 12” (305 mm) long, allowing it to protrude
about 6” (150 mm) from the Front End Plate.
9. Enter the protruding end of the rod into the dowel hole at the
bottom of the motor housing bore and slide the motor into the
Motor Housing.
10. Run the Backhead Cap Screws (25) and (26) nger-tight. Then
turn each a little at a time until all are tight.
Assembly of the Impact Mechanism
When assembling the Ball Cam (75) in the Hammer (77), stand the
Hammer, jaw end down, on the table of an arbor press and enter
the Hammer Spring (76) into the hammer bore. Note that one
ring of the Hammer Spring Thrust Bearing (73) is held rmly in the
shell, while the other is free to rotate.
Place the Bearing on the Spring so that the free ring rests on the
end of the Spring.
Align the points of the cam grooves in the Ball Cam with the holes in
the hammer wall and slide the Ball Cam over the Bearing and Spring.
Press on the cam rear face, telescoping the Ball Cam into the
Hammer against the compression of the Spring, until a Cam
Ball (74) can be entered into each cam groove through the holes
in opposite sides of the Hammer.
Use a Reverse Valve Bushing Reamer to size a new Reverse Valve
Bushing (3) after pressing it into the Motor Housing.
Use a Governor Valve Bushing Reamer to size a new Governor
Valve Bushing (4) after pressing it into the Motor Housing.
Periodically, examine the Hammer Case Bushing (83). Install a new
Bushing if the present one is worn to the extent that the shank on
the Anvil (86) is a loose t in the bushing bore.
1.
2.
3.
4.
5.
6.
7.
Assembly of the Impact Wrench
WARNING
Never attempt to assemble a Model 588A1 or 588A1-EU Impact
Wrench without a hoist, block and tackle or other lifting device.
The complete Impact Wrench and its major assemblies are
too heavy to be manually handled. Follow the recommended
procedure for assembly below.
Make sure that the square driver is engaged in a large Socket (89)
and that the Socket is resting on level footing so that the Hammer
Case containing the assembled impact mechanism components
are standing upright to prevent the tool from tipping over during
assembly.
Attach the hoist sling to the planet gear frame assembly and
lower the Gear Case (49) with assembled parts onto the Hammer
Case (82).
Attach the hoist sling to the Motor Housing (1) and lower the
Motor Housing with assembled parts onto the Gear Case (50).
Install the Hammer Case Long Bolts (11) and Hammer Case Short
Bolts to secure the Gear Case and Motor Housing in position.
Oversize Hammer Case Bushings
The continued use of a worn Hammer Case Bushing may permit the
Bushing to deform or enlarge the hole in the front of the Hammer
Case so that the Case no longer retains the Bushing properly. Should
the Bushing become loose in the Case, an oversize Bushing should
be installed. Bushings .005”, .010”, .015” and .03 1” are available. The
amount of oversize is etched on the oversize Bushing; the standard
size Bushing is unmarked.
After removing a loose Bushing, examine it for oversize etching. If
unmarked, replace it with a .005” oversize Bushing; if it is marked,
replace it with the next larger oversize Bushing. When pressed in, the
oversize Bushing will automatically true up the deformed opening in
the Hammer Case.
1.
2.
3.
4.
Troubleshooting Guide
Trouble Probable Cause Solution
Low power Worn or broken Vanes Replace the complete set of Vanes.
Worn or broken Cylinder and/or scored End Plates Examine the Cylinder and replace it if it is worn or
broken or if bore is scored or wavy. Replace End
Plates if they are scored.
Dirty motor parts Disassemble the tool and clean all parts with
a clean, suitable, cleaning solution in a well
ventilated area. Assemble the tool and inject 3
cc of recommended oil into Inlet and run tool to
lubricate internal parts.
Improper positioning of the Reverse Valve Make certain that the Reverse Valve is fully
engaged.
Motor will not run Incorrect assembly of motor Disassemble motor, replace worn or broken parts
and reassemble as instructed.
Insucient lubricant in impact mechanism Remove the Hammer Case Assembly and
lubricate the impact mechanism.
Tool will not impact Broken or worn impact mechanism parts Remove the Hammer Case Assembly and
examine impact mechanism parts. Replace any
worn or broken parts.
Impact mechanism not assembled correctly Refer to Assembly of Impact Mechanism.
Related Documentation
For additional information refer to:
Product Safety Information Manual 04580916.
Product Information Manual 03523017.
Parts Information Manual 16600975.
Manuals can be downloaded from www.irtools.com.