PS Magazine - TB 43-PS-667

PS, The Preventative Maintenance Monthly

ISSUE 667

JUNE 2008
PS Magazine - TB 43-PS-667 - Page 9 of 32
14
PS 667
JUNE 08
Radiator Cap
Radiator caps should be tested periodically to make sure they work properly. A
defective cap can cause loss of coolant, over-pressure damage or collapse of cooling
system components.
Here’s how to test the radiator cap with this tester:
Begin by looking at the radiator cap
to make sure the gasket is not cracked
or torn. Replace the cap if the gasket is
damaged.
Get an adapter from the testing kit
that will Ft your radiator cap.
Attach the adapter to the pump’s
nozzle.
Moisten the gasket on the cap with
water or antifreeze, the way it would be
under normal conditions.
Attach the radiator cap to the adapter.
Work the pump until the gauge shows
the required pressure (psi). The psi is
stamped on the radiator cap.
If the cap is good, the needle on the
gauge will hold at the required psi. If
the needle doesn’t hold, the cap is losing
pressure. And it’s time for a new cap.
Using the ST255 radiator testing kit, NSN
4910-00-728-8227, allows you to test the radiator
cap and your vehicle’s entire cooling system. The
kit is listed in TM 750-254,
Cooling Systems:
Tactical Vehicles.
The ST255 radiator testing kit includes a hand
pump, a pressure gauge, and adapter Fttings for
attaching to the various types of caps.
ST255
Radiator
Testing
Kit…
whatever
happened to
that radiator
testing kit?
Attach adapter
to pump’s nozzle
Use ST255
radiator
testing kit,
NSN 4910-00-
728-8227
Attach radiator cap to adapter
Want your
vehicle’s cooling
system to stay in
business?
Well, here are
preventive maintenance
equipment and tests
that can save on
repair bills, and keep
you
out of hot water!
Can your vehiCle’s cooling
system pass the test?
hey!
this
isn’t a
sauna!
667.14-15.indd
1-2
5/5/08
6:13:59 PM
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