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|  MIL-T-62735
(d) Three-way valve, for raising, lowering, or holding the fifth wheel in all desired
positions. The valve shall be in the cab, accessible to the seated driver
(e) Snubbers to eliminate spring deflection
(f) Pneumatic system to open and to lock the kingpin jaws, with two linked controls in
the cab, accessible to the seated driver. Simultaneous operation of both controls
shall be required to open the kingpin jaws. The controls shall be spaced so
simultaneous operation will require two hands.
(g) Controls identified in accordance with 3.10.5.
3.4.2.16 Truck tractor with near winch(es). When specified for class 66 and larger
(see 6.2), the truck tractor shall be fully equipped for use with folding gooseneck semitrailers and
for use in pulling disabled vehicles onto coupled semitrailers. The truck tractor shall include a
rear winch(es), all accessories required to fulfil these winching functions and shall conform to
3.4.2.16.1 thru 3.4.2.16.7. The truck tractor and winch(es) shall conform to table XVI. Unless
otherwise specified, a single 30,000 pound capacity winch shall be furnished. When specified
(see 6.2), single or dual 45,000 pound capacity winches shall be furnished, as specified.
Otherwise, the truck tractor shall conform to 3.4.2 through 3.4.2.13 and all options therein
specified in acquisition documents. The lengths of the semitrailer lighting cable(s) and air hoses
shall be the free lengths to the rear of the winch(es).
TABLE XVI Rear mounted winch(As) and their vehicle characteristics.
Winch capacity
Single or dual
Winch rope
CT (max)
SR clearance
LWC
(each),
winches,
diameter
mm (inches)
mm (inches)
dimension
kg (pounds)
winch type
mm (inches)
(max) mm
(inches)
13 600 (30,000) Single non-
19 (0.75)
3050 (120)
1620 (64)
2030 (80)
hydraulic or
hydraulic
20 400 (45,000) Single
25 (1.0)
3050 (120)
1620 (64)
2030 (80)
hydraulic
20 400 (45,000) Dual
35 (1.0)
Chassis mfgr. 940 (37) 1/
2620 (103) 1/
hydraulic
min. length
See 3.4.2.20 See 3.4.2.20
production
line std.
suitable
1/ NOTE: Truck tractors with the SR and LWC noted (1/) above are special purpose
vehicles and are not compatible with any general purpose commercial
semitrailer.
36
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