TM 9-4940-549-14&P
STEP 1. USE OHMETER TO SET SLIDE OF ADJUSTA-
BLE RESISTOR TO GIVE RESISTANCE OF
900 OHMS.
STEP 2. LOOSEN LOCKING NUT. TURN ADJUSTING
SCREW COUNTERCLOCKWISE UNTIL SOLE-
NOID PLUNGER BOTTOMS. TIGHTEN LOCK-
ING NUT.
STEP 3. START AND WARM UP THE ENGINE.
STEP 4. START THE DYNAMOTOR-WELDER.
STEP 5. INCRESE ENGINE SPEED UNTIL TACHOMETER
READS 1,350 RPM. OVERSPEED
SAFETY
SWITCH SHOULD SHUT ENGINE DOWN. IF
IT FAILS TO DO SO LOOSEN LOCKING NUT.
TURN ADJUSTING SCREW CLOCKWISE UNTIL
ENGINE STOPS. TIGHTEN LOCKING NUT.
STEP 6. CLOSE AND LATCH
OVER
SPEED
SAFETY
SWITCH-COVER.
STEP 7. STOP THE DYNAMOTOR-WELDER.
Overspeed Safety Switch Adjustment.
