TM 10-4610-241-24
TO 40W4-13-42
3-47. TIMER REPAIR (MODELS WPES-10, WPES-20 AND WPES-30) - continued.
b.
Cleaning
(1)
Using a soft-bristled brush, clean electric contacts, cover, mounting hardware, and latches.
(2)
Using dry cloth, clean box.
C.
Inspection.
(1)
Inspect terminal boards, and stager for breaks, overheating, and terminal damage.
(2)
Inspect printed circuit board for cracks, breaks, overheating, and circuit damage.
(3)
Inspect all tube fittings for stripped or damaged threads.
(4)
Inspect timer box and cover for damage.
(5)
Inspect wires for burned insulation, bare spots and other defects.
d.
Repair.
Replace lo&washers, gaskets and damaged or unserviceable components.
e.
Test.
This test is limited to stager assembly and is intended to test the electric motor, the three cam switches and the
wiring of the stager assembly. Defects in any of these, except minor defects in wiring should result in replacement
of the stager.
(1)
Check wires for continuity.
CAUTION
Be sure to turn cams in direction of arrow. Any attempt to turn in opposite direction may
damage stager.
NOTE
Cam has to be turned to change roller position
(2)
Check if motor driven cams turn freely if turned by hand.
(3)
Perform a continuity test through motor and switches as follows:
Item Checked
Contacts
Roller Position
Required Readings
Top Switch
1-2
Top of Cam
Continuity
1-2
Cam Groove
open
3-368 Change 1
