4-138. ENGNE SENDING UNITS - Continued
b. Water Temperature Sending Unit.
(a) Run main engine and monitor water temperature
gauge on pump panel and in cab. Each gauge is
supplied from a different sender.
(b) If no temperature is recorded on pump panel
gauge, replace gauge assembly on pump panel
(see para 4-18.).
(c) If no temperature is recorded on gauge in cab,
ground the S terminal on gauge. If gauge does
not register, replace gauge.
(d) If gauge registers, either sending unit or wire is at f
(e) To check wire for continuity, see Wiring Diagrams
(Appendix H), to replace sending unit,
see para (a) below.
(a) Tag and disconnect wires (1) from sending unit (2).
(b) Remove sending unit (2) from thermostat housing (3)
(a) Install new sending unit (2) in thermostat housing (3).
(b) Connect wires (1) to sending unit (2).