PS Magazine - TB 43-PS-587
PS, The Preventative Maintenance Monthly
ISSUE 587
OCTOBER 2001
PS 587
OCT 01
5
HMMWV.
..
Stoplight Adjustment
A
stoplight switch that's slightly out of adjustment can be a pain in your neck,
HMMWV operators—in more ways than one.
If your truck's brake lights don't come on when you push the brake pedal down
1
∕
4
inch or less, you could be slowing down and the folks behind you won't know it until
it's too late for them to stop.
So check now to see if your stoplights are working. Here's how:
✔
While another soldier watches at the rear of the vehicle, depress the brake pedal.
The stoplights should come on within
1
∕
4
inch of pedal travel.
✔
If the lights don't come on until the pedal is depressed more than
1
∕
4
inch, get your
mechanic to do some maintenance.
✔
The adjustment info for basic and A1 models is on Pages 4-98 and 4-99 of TM
9-2320-280-20-2. For A2 models, see Pages 4-100 and 4-101.
The reference to
1
∕
2
inch of pedal travel on Page 4-98 is wrong. One-quarter inch
is right.
M939-Series Trucks…
E
ven when engine temperature is normal, the ENGINE HOT light on early M939-
series 5-ton trucks may come on.
If the light comes on while you're driving, don't pull over until you take a look at
the temperature gauge. If the gauge reads in the normal range, keep on truckin'.
'Course, if it reads hot, pull over and get help.
M35A3 Compressor Parts
F
ig 114 of TM 9-2320-386-24P gives some bum info on the M35A3 truck’s air
compressor. Item 5, check valve, and Item 6, check valve seat, are not used on the
M35A3. Additionally, you only need one gasket (Item 4) instead of the two called
for in the figure. That means you’ll never need kit, NSN 2530-01-321-2243, that
contains all four of these parts. Just order the single gasket, NSN 5330-01-423-3412.
FMTV Van Air Conditioner
M
ake a note in Fig 267, TM 9-2320-365-24P, that you do not get the air con-
ditioner, NSN 4120-00-974-7206, when you order air conditioner
kit,
NSN
4130-01-456-0718. The kit NSN, Item 1, brings all the items listed in the figure
except Item 2, the air conditioner. The next TM update will correct this error.
Early on, the headshed decided the warning light wasn't needed. So, they dropped
the light on later production trucks.
If your truck has a light that doesn't work right, get your mechanic to remove it.
The procedures are in EIR Digest TB 43-0001-39-2 (Apr 86).
If your unit doesn't have a copy, see your TACOM LAR or write to Half-Mast.
HEY! that
engine
hot
light
is wrong!
Check engine gauge
ENGINE HOT Light on?
587. 04-05 (C)
9/3/01
6:31 PM
Page 1
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