TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Radiator Hoses (008-045)
Section 8 - Cooling System - Group 08
Page 8-41
WARNING
If a liquid refrigerant system must be removed before
removing the radiator, wear eye and face protection.
Wrap cloth around the fittings before removal. Liquid
refrigerant can cause serious eye and skin injury.
For environmental protection, federal regulations require
that freon be recycled and not vented into the atmosphere.
Radiator Hoses (008-045)
Inspect for Reuse (008-045-007)
Inspect all hoses for cracks, cuts, or collapsing.
NOTE: The silicone engine coolant hose will exhibit swell-
ing due to the elasticity of the hose.
Radiator Pressure Cap (008-047)
General Information
Pressure Caps
The system is designed to use a pressure cap to prevent
boiling of the coolant.
Different caps are specified for the two recommended sys-
tems:
Radiator Cap Pressure Test
System
Cap
A (Normal-
104C [219F]
103 KPa [15 psi]
Duty)
B (Light-Duty) 99C [210F]
48 KPa [7 psi]
NOTE: An incorrect or malfunctioning cap can result in the
loss of coolant and the engine running hot.
L-1097