940-220 Powerig®
(HK604)
Alcoa Fastening Systems
10
S
S
PARE
PARE
P
P
ARTS
ARTS
See Figure 7.
1. Remove the top cover of the switch.
2. Loosen two screws located in the bottom of the
switch housing.
3. Place a O.20-inch-thick shim between the spring
retainer and the platen.
4. Loosen the set screw on the spring retainer until
it contacts shim.
5. Lock the spring retainer in place with the set
screw.
6. Slide the switch mounting bracket toward the
switch button until it contacts the platen surface.
7. Secure with two screws located in the middle of
the bottom cover.
8. Connect a volt/ohm meter to the electrical cord.
9. Tighten the switch adjustment screw against the
switch mounting bracket until the switch button
contacts the platen and actuates. The volt/ohm
meter will react when the button actuates. A click
can be heard.
10. Continue tightening the switch adjustment screw
1/8 of a turn after the switch button actuates.
11. Replace the top cover of the switch.
The quantity of spare parts that should be kept on
hand varies with the application and number of the
Hydraulic Units in service. For directional valve and
pilot valve maintenance, Seal Kit, 124100, should be
kept on hand at all times. This kit contains O-rings
and back-up rings required to service one directional
valve and one pilot valve.
Other parts that should be available to the service
technician are: Pump to Motor Coupling, Relay,
Transformer, Pilot Valve, and Motor Brushes.
I
I
NTERNAL
NTERNAL
A
A
DJUSTMENT
DJUSTMENT
OF
OF
P
P
RESSURE
RESSURE
S
S
WITCH
WITCH
If minor overhaul of the directional valve (cleaning
and replacing O-rings and back-up rings) is neces-
sary, Seal Kit, 124100, is available. If major overhaul
is necessary, return the directional valve to the near-
est repair facility shown on the inside of the back
cover.
Clean components in mineral spirits. Smear
LUBRIPLATE l30AA, or equivalent, on O-rings and
mating surfaces to aid assembly and prevent dam-
age to O-rings. LUBRIPLATE is trademarked and
manufactured by Fiske Brothers Refining Co. and is
available in most localities. A handy tube of
LUBRIPLATE 130AA is available from Huck as part
number 502723.
D
D
IRECTIONAL
IRECTIONAL
V
V
ALVE
ALVE
O
O
VERHAUL
VERHAUL
The pump to motor coupling can be replaced by
removing four socket cap screws holding the motor
housing to the cover plate and lifting the motor to
one side. Lift out the original coupling with needle-
nose pliers. Drop in the new coupling, align the slots
and reassemble motor to cover plate.
R
R
EPLACING
EPLACING
P
P
UMP
UMP
TO
TO
M
M
OTOR
OTOR
C
C
OUPLING
OUPLING
P
P
UMP
UMP
O
O
VERHAUL
VERHAUL
If pump requires overhaul return it, or the complete
unit, to the nearest repair facility shown on the inside
of the back cover.
