TM 10-5410-228-24
3.9.8
Heater Coil Replacement Continued.
(5)
Check two hose assemblies (1 and 2) sealing surfaces for damage or material build up. Clean
any material build up with clean, lint-free cloth. If required, replace two hose assemblies (1 and
2) per para 3.9.11.
(6)
Install two new O-rings (5) (Item 51, Appx E) on two hose assemblies (1 and 2). Ensure two
O-rings (5) are seated and retained properly.
(7)
Install two new O-rings (5) (Item 51, Appx E) on ECU enclosure (4) bulkhead fittings. Ensure
two O-rings (5) are seated and retained properly.
(8)
Lubricate four O-rings (5) with a light coating of hydraulic fluid.
(9)
Install two hose assemblies (1 and 2) on two hose ports on heater coil (3) and on ECU enclosure
(4) bulkhead fittings.
(10) Torque both hose ports on heater coil (3) and ECU enclosure (4) bulkhead fittings to 1,080 45
in.-lb (90 4 ft-lb).
(11) Refer to para 3.9.3 to service hydraulic system.
Figure 3-13. Heater Coil Replacement
Follow-on maintenance: Install ECU per para 3.9.21, fill hydraulic reservoir per para 2.14.3, install or close
ECU covers and doors per para 2.14.1, remove tag, apply system power and perform operational test. Check
for leaks.
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