Table 4-1. Unit Preventive Maintenance Checks and Services for AN/MJQ-40, PU-803, and PU-804.
This PMCS table lists the checks and services as performed on a single Power
Unit. These procedures must be duplicated on each Power Unit that makes
up the AN/MJQ-40.
Unit B of the ANMJQ-40, PU-803, and PU-804 does not have a switch box.
Maintenance for the switch box is only applicable to Unit A of the
Item to be
Not Fully Mission
Checked or Serviced
Before performing any maintenance that requires climbing on or under trailer, make
sure that trailer handbrakes are set, trailer front landing leg is lowered, and rear
leveling-support jack is lowered. Injury to personnel could result from trailer suddenly
rolling or tipping.
Inspect power cable for worn,
Power cable is
frayed or cracked insulation,
loose terminal lugs, and loose
connections. Tighten as needed.
SWITCH BOX ASSEMBLY
a. Inspect switch box assembly.
Refer to paragraph 4-12.
b. Inspect mounting brackets for
cracks or loose or missing
Inspect for cracks and
Mounting rail is
cracked or deformed.
a. Inspect for broken seal and
damage to handle.
b. Weigh to determine whether
Fire extinguisher not
charge is sufficient. Weight is charged.
about 13 pounds when fully
charged. If weight is 12.5
pounds or less, send to
specialized activity for