4
REASSEMBLY
All parts should be cleaned in a solvent and inspected for
wear or damage. If rotor blades measure less than 5/16"
(7.9mm) on either end, they should be replaced. Rotor
bearings should be replaced if they show excessive loose-
ness. Rotor shaft seals and the anvil seal should be
replaced if they are badly worn or no longer flexible.
Clean the bearing plates and anvil housing with a solvent
and coat the seal bores with "PERMATEX" Aviation Form-
a-gasket #3H. Allow to air dry at least four (4) minutes
before pressing in the seals. Press the rotor shaft seals into
the bearing plates with their "lips" facing outward (visible
after assembly). Press the anvil seal into the anvil housing
with its "lips" toward the rear of the housing ("lip" not visible
after assembly).
All impact mechanism and motor parts should receive a
thin coating of 30W oil before reassembly. Insert the cam
timing pin into the recess located on the small O.D. of the
cam and then install the cam and pin into the rear of the
hammer. Install the cam roller shaft in the cam shaft. Put
the cam roller on the roller shaft and slip the butt plate,
insulator, and shock absorber onto the rear of the cam
shaft. Hold the cam shaft vertically on the work bench with
the shock absorber down and tap the end of the cam shaft
with a soft mallet to seat the cam shaft in the shock
absorber.
Slip the cam shaft and related components through the
cam and hammer assembly. Install the hammer spring,
spring clip, and anvil pin onto the front of the cam shaft and
hammer assembly. Rotate the spring clip to accept the
anvil pin and then install the anvil on top of the assembly
(be sure the slot in the anvil lines up with the anvil pin) and
drive the anvil down until the spring clip engages the recess
in the anvil.
During the assembly of the motor unit, the rear of the rotor
can be identified by the "O"-ring, No. 869715, and the "O"-
ring groove located in the l.D. of the rotor bore. The cylinder
port "O"-rings can be coated with grease to retain them
during assembly of the motor unit.
During reassembly of the complete tool, 3/8 fluid ounces
(12ml) of 30W oil should be placed in the anvil housing.
Install the anvil housing on the tool with the straight flange
down (i.e., toward the trigger). Before installing the rear
cap, 1/4 fluid ounce (8ml) of 30W oil should be added to the
rear cavity of the rotor.
All tools should be tested after repair or replacement or
parts to ensure that they are functioning properly.
OPERATING INSTRUCTIONS
OPERATION
The WP-2049 and WP-2050 Impact Wrench is designed to
operate on 90 psig (6.2 bar). The minimum hose size is
3/8" (10mm).
LUBRICATION
An automatic in-line filter-lubricator is recommended as it
increases tool life and keeps the tool in sustained operation.
The in-line lubricator should be regularly checked and filled
with a good grade of 10W machine oil. Proper adjustment of
the in-line lubricator is performed by placing a sheet of paper
next to the exhaust ports and holding the throttle open
approximately 30 seconds. The lubricator is properly set
when a light stain of oil collects on the paper. Excessive
amounts of oil should be avoided. In the event an in-line
lubricator is not used, the oil reservoir in the handle should
be utilized.
The oil reservoir marked "30W Oil" should not require
attention until the tool is torn down for inspection purposes.
However, if the tool is on the application for an unduly long
period of time, the plug should be removed and the reservoir
checked for the presence of oil. If oil is required, approxi-
mately 1/2 fluid ounce (16ml) of 30W oil should be added to
the oil reservoir.
STORAGE
In the event that it becomes necessary to store the tool for
an extended period of time (overnight, weekend, etc.), it
should receive a generous amount of lubrication at that time
and again when returned to service. The tool should be
stored in a clean and dry environment.
SERVICE INSTRUCTIONS
DISASSEMBLY
Loosen and remove the four (4), housing bolts. This will
allow the anvil housing and impact mechanism to be re-
moved from the front of the motor housing. The motor unit
may now be slipped out the rear of the motor housing.
Clamp the hammer, No. 869325, horizontally in a soft-jawed
vise and drive the anvil away from the hammer, using a soft
hammer. This will allow the anvil pin, No. 867437, spring
clip, No. 869336, and the hammer spring, No. 869345, to be
removed from the front of the cam shaft, No. 869322. This
will allow the cam shaft and related components to be
removed from the rear of the hammer.
Slip the two (2) bearing plates off the rotor and remove the
cylinder and six (6) rotor blades.
Unscrewing the air inlet bushing will allow the throttle valve
to be removed for inspection of the throttle valve seal.
Remove the air inlet screen for cleaning and inspection.