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TM 5-4210-220-12
4-15 AUXILIARY POWER UNIT - Continued
4-15.13 Engine Governor
This task covers
a.
Removal
b.
Inspection
c.
Installation
TOOLS
Tool Kit, Master Mechanic,
NSN 5180-00-699-5273
EQUIPMENT CONDITION
APU Shutdown (see para. 2-12)
Engine Removed from Base (see para. 4-15.1)
MATERIALS/PARTS
500.4601.020 Crankcase cover gasket (0.20 mm)
500.4601.002 Crankcase cover gasket (0.30 mm)
REMOVAL
(1)
Remove governor/oil pump assembly
from engine as detailed in 4-15.13, Oil
Pump Replace, steps 1 thru 14.
(2)
Remove injector pump, see para. 4-
15.6 REMOVAL.
(3)
Remove circlip (7) from governor drive
gear.
(4)
Remove moving bell (8), slotted collar
(10) and six balls (9) from the drive gear
(11).
(5)
Disconnect spring (1) from pin (2) and
remove
screws
(3)
from
governor
actuating plate (4).
(6)
Slide governor shaft (5) out of oil pump
housing (6).
INSPECTION
(1)
Remove spring B and check free length is
2.25 in. (57.0 mm). Spring length should
be 2.84 in. (72.0 mm) with a load of 3.3 lb
(1.5 kg). Replace/install spring as
required.
(2)
Check free length of governor spring (A)
is 1.18 in. (30 mm). Replace/install spring
as required.
(3)
Remove cotter pin and bushing from fuel
rack and remove fuel rack from fuel
control lever pin
4-188
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