Specifications

MS TECHNICAL MANUAL
LAST UPDATE 12-10-04
1060003 12/04
TESTING HI-LIMIT
See Hi-limit under “Component Description & Function” before proceeding.
To test for continuity: Disconnect wires to isolate hi-limit.
Verify continuity across the terminals.
Replace if fails test.
To determine if hi-limit is tripping prematurely: Monitor the generator’s
surface or internal temperature.
Does hi-limit trip below 450 F (232 C)? If yes, replace hi-limit.
To determine if hi-limit is tripping too late, or not at all: Short relay
terminals 1 & 2 together (This simulates an overheating condition).
Monitor the generator’s surface or internal temperature.
Does the temperature exceed 610 F (321 C)? Is the generator still
drawing amperage? If yes, replace hi-limit.
NOTE: Reinstall any removed wiring to their original terminals.
Replacement Procedures
Disconnect hi-limit wires.
Remove lock nut & dismount the ceramic body.
Remove cap tube bracket & pull cap tube out of
generator hole.
Install new hi-limit & secure with bracket & lock nut.
Reinstall wiring onto hi-limit.
Test unit for proper operation.