TM 5-3810-307-24-1-1
AXLE PROXIMITY SENSOR ASSEMBLIES
Description
There are two axle proximity sensor assemblies installed on the crane, one on each axle. The proximity sensor
assembly on the front axle is connected to the indicator lights for the FRONT AXLE STEERING control in the
superstructure cab. The assembly on the rear axle is connected to the indicator lights for the REAR AXLE
STEERING control in the carrier cab. The assemblies are comprised of proximity sensors connected to a wiring
harness. The assembly on the rear axle also includes a sensor which is connected to the rear axle steering lock
indicator lights in both cabs.
The purpose of the axle proximity sensor assemblies is to indicate to the operator that the wheels, for the axle
being steered with the steering control toggle switch, are turned from center. When the wheels are centered, the
center indicator light on the dash is lit. When the wheels are moved from center using the steering control toggle
switch, the right or left indicator light will be lit indicating the direction in which the crane will turn, except when
crabbing (crane will crab in opposite direction of indicator lit). When the rear axle is being steered from the
carrier cab, the center indicator light also means that the rear steering cylinder locking pin is near alignment and
can be activated. When the rear steering lock pin engages, the sensor is then close enough to the pin to
complete the circuit and light the rear axle steering lock indicator light.
Removal
a.
Ensure battery disconnect switch is in the OFF position.
b.
Remove front axle proximity sensor assembly (12, Figure 2-4-3) as follows:
(1)
Disconnect electrical connector for proximity sensor assembly (12) from carrier electrical harness.
(2)
Remove nuts (1), lockwashers (2), washers (3), and clamps (4) securing proximity sensor assembly
(12) electrical wires to studs on axle.
(3)
Loosen nuts (5), and remove screws (6), nuts (5), and ground wires for EMI shields (8) from
adjustment brackets (10).
(4)
Remove clamps (7) securing EMI shields (8) to sensors of proximity sensor assembly (12).
(5)
Remove nuts (9), adjustment brackets (10), proximity sensor assembly (12), and washers (13) from
axle bracket.
c.
Remove rear axle proximity sensor assembly (25, Figure 2-4-3) as follows:
(1)
Disconnect electrical connector for proximity sensor assembly (25) from carrier electrical harness.
(2)
Remove nuts (14), lockwashers (15), washers (16), and clamps (17) securing proximity sensor
assembly (25) electrical wires to studs on axle.
(3)
Loosen nuts (18), and remove screws (19), nuts (18), and ground wires for EMI shields (21) from
adjustment brackets (23).
(4)
Remove clamps (20) securing EMI shields (21) to sensors of proximity sensor assembly (25).
(5)
Remove nuts (22), adjustment brackets (23), proximity sensor assembly (25), and washers (26)
from axle brackets.
