TM 9-2330-271-14&P
(2) Secure carrier to mounting bracket with four
lower member in such a manner that both ends may be
screws (3), lock washers (2) and nuts (1).
clamped with both U-bolts (10).
(3) Raise spare wheel and tire carrier
(7) Install lock washers (12) and nuts (13) on
two U-bolts (10).
f.
Installation (fig. 43).
(1) Aline four holes in carrier upper member
with holes in mounting bracket.
Section XI. MAINTENANCE OF LEVELING JACK AND
LANDING GEAR
(3) Remove cotter pin (8), washer (7) and
4-49.
Leveling Jack
straight headed pin (9) from top of housing assembly.
(4) Release pin and chain assembly (4) and
a.
General.
remove housing assembly (10).
(1) All semitrailers, except for XM738, XM739,
b. Inspection. Follow the procedure of paragraph
and XM739E1, have two leveling jacks located at the
rear of the semitrailer (fig. 2-7).
c. Installation (fig. 47).
(2) The XM738, XM739, and XM739E1
(1) Position housing assembly (10) under
semitrailers have four leveling jacks, two at the rear and
chassis and secure with straight headed pin (9), washer
two at the center of the semitrailer.
(7), and cotter pin (8). Install pin and chain assembly (4)
(3) The leveling jacks are used to level and
on housing assembly.
stabilize the semitrailer.
(2) Position three braces (6) and secure with
b. Removal (fig. 46).
three straight headed pins (1), washers (3), and cotter
(1) Remove two cotter pins (7), washers (8),
pins (2) at top of brace assemblies.
and headed pins (9).
(3) Install three pin and chain assemblies (13)
(2) Release pin and chain assemblies (11) and
at bottom of brace assemblies through housing.
remove braces (2 and 10).
(3) Remove cotter pin (6) and headed pin (3)
4-51.
Rigid-Type Landing Gear (all models except
and washers (5).
(4) Release pin and chain assembly (12) and
XM847, XM848, XM849, XM850, XM912,
remove leveling jack housing (4).
XM913)
c. Inspection.
(1) Inspect housing for damage.
a.
General.
(2) Check operation of jack screw. Lubricate
(1) The XM574, XM574E1, XM680, XM680E1,
as required (figs. 3-1 and 3-3). Replace leveling jack if
XM738, XM739, XM739E1, XM822, XM823, XM824,
jack screw is defective.
XM844, and XM845 semitrailers incorporate a
(3) Inspect pin and chain assemblies for wear
retractable
two-speed,
crank-type,
non-rotating,
and damage. Replace defective parts.
adjustable landing gear with wheels (fig. 2-1).
d. Installation (fig. 46).
(2) The XM654 semitrailer incorporates a
(1) Position housing (4) under dolly rear
retractable, two-speed, crank-type, non-rotating,
crossmember and secure with headed pin (3), washer
adjustable landing gear with a landing gear foot (fig. 2-
(5), cotter pin (6) and pin and chain assembly (12).
2).
(2) Position braces (2 and 10) and secure with
(3) The landing gear is used to support the
two pin and chain assemblies (11), two headed pins (9),
semitrailer when not coupled to a towing vehicle. It is
washers (8) and cotter pins (7).
also used to raise and lower the chassis when preparing
to couple or uncouple the semitrailer from the towing
4-50.
Center Leveling Jack, XM738, XM739,
vehicle.
b. Removal (fig 4-36).
XM739E1
a. Removal (fig. 47).
(1) Couple semitrailer to towing vehicle. raise
landing gear leg to remove semitrailer weight from leg.
(1) Remove three cotter pins (2), washers (3),
and straight headed pins (1) securing top of brace
assembly (6) to chassis.
(2) Release three pin and chain assemblies
(13) securing bottoms of three brace assemblies to
housing and remove three brace assemblies (6).
4-52
