e. At the same time you are prying on the
brake drum, have an assistant use a 1/4-inch
punch and a 1-pound ballpeen hammer to tap on
the drum between the studs.
f. If the drum doesn't come off after a few taps,
squirt on more penetrating oil, let stand a few
minutes, and try again.
3. The hydraulic brake boosters on the M1009 CUCV are different from all other models of CUCV's. If you put an
M1009 booster on another model CUCV, the brakes will not work right.
4. The boosters look alike except for the pushrod end, where it attaches to the brake pedal. The housing on the M1009
booster is machined flat, or has a 40- to 50-degree bevel. It is assigned NSN 2530-01-154-1294.
The pushrod end has a shallower, 20- to 30-degree bevel.
6. If you are not sure which booster is on a CUCV, get a flashlight and look under the dash. Follow the brake pedal up
to where it connects to the booster pushrod on the firewall. Look close at the bevel on the pushrod housing.
If the CUCV has the wrong booster, don't wait, change it.