Piper Navajo PA-31 Service Manual page 750

PIPER NAVAJO SERVICE MANUAL
11-74. STARTING
MOTOR SERVICE TEST
SPECIFICATIONS. PRESTOLITE
Specifications for 24 volt starting motors installed as standard equipment on the PA-31 are
as follows:
Motor Model
MHB-4001 or MHB-4007
Min. Brush Tension
32 oz.
Max. Brush Tension
40 oz.
No-Load Test (75° F)
Volt
20
Max. Amps
35
Min. R.P.M.
1300
Stall Torque
Amps 260
Min. Torque,
Ft. Lbs.
27.0
Approx. volts
14.0
Pinion Position*
Drive at rest 1.748" - 1.855"
Drive extended
2.388"
- 2.496"
*This dimension
is measured from the centerline
of
the mounting hole nearest
the drive end head to the
edge of the pinion.
11-75.
BATTERY.
11-76. SERVICING BATTERY.
Access to the battery
is through the nose bag-
gage compartment panel. The stainless
steel box has a plastic drain tube located
on the bottom side near the right rear corner which is normally closed off with
a clamp and should be opened occasionally
to drain off any accumulation
of liquid.
The battery should be checked
for fluid level, but must not be filled above the
baffle plates.
As hydrometer check should be performed
to determine the per
cent of charge present in the battery. All connections
must be clean and tight.
If the battery is not up to normal charge,
recharge starting with a charging rate
of 2 amperes and finishing with 1 ampere.
Reissued: 10/12/79
ELECTRICAL SYSTEM
4C24