TM 5-3825-213-20
CHAPTER 4
SNOWPLOW MAINTENANCE INSTRUCTIONS
Section I. PLOW HYDRAULIC SYSTEM
(3) Replace a defective hydraulic oil pump.
56. General
c. Installation. Install the plow hydraulic pump
Hydraulic cylinders raise and lower the plow
assembly as illustrated in figure 11.
frames, move the discharge chutes up and down, and
rotate the chutes. These operations are all controlled by
59. Chute Hydraulic Oil Junction Block Assembly
a manifold control valve inside the carrier cab. Hydraulic
a. Removal. Remove the chute hydraulic oil
pressure to operate these components is supplied by a
hydraulic pump. Hydraulic hoses connect the pump and
junction block assembly as illustrated in figure 12.
hydraulic reservoir to the valves, and connect the valves
b. Cleaning and Inspection.
to the hydraulically operated components of the plow.
(1) Clean the block assembly in an
approved cleaning solvent and dry
thoroughly.
57. Plow Hydraulic Oil Reservoir
(2) Inspect the block for cracks or breaks
a. Removal.
and damaged threads.
(1) Drain the hydraulic reservoir (TM 5-
(3) Replace a defective block assembly.
3285-213-10).
c. Installation. Install the chute hydraulic oil
(2) Remove the plow hydraulic oil
junction block assembly as illustrated in figure 12.
reservoir as illustrated in figure 10.
b. Cleaning and Inspection.
60. Plow Hydraulic Control Manifold Assembly
(1) Clean the reservoir with an approved
a. Removal.
Remove the plow hydraulic
cleaning solvent and dry thoroughly.
control manifold assembly as illustrated in figure 13.
(2) Inspect the reservoir for broken welds,
b. Disassembly.
Disassemble the plow
damaged threads, and bends.
hydraulic control manifold assembly as illustrated in
(3) Replace
a
defective
hydraulic
reservoir.
c. Installation. Install the plow hydraulic oil
c. Cleaning, Inspection, and Repair.
(1) Clean all parts in an approved cleaning
reservoir as illustrated in figure 10.
solvent and dry thoroughly.
Caution: When working on the
58. Plow Hydraulic Pump Assembly
a. Removal. Remove the plow hydraulic pump
hydraulic system be sure to cover
assembly as illustrated in figure 11.
openings and keep work area free
b. Cleaning and Inspection.
of dust and dirt. Dust and dirt are a
(1) Clean the hydraulic pump with an
great contributor to the malfunction
approved cleaning solvent and dry
of the hydraulic system.
thoroughly.
(2) Inspect the pump for free rotation and
damaged housing and threads.
33