Western HTS Mechanic's Manual page 7

SPECIFICATIONS
FloStat Hydraulic System
®
CAUTION
Do not mix diff erent kinds of
hydraulic fl uid. Some fl uids
are not compatible and may
cause performance problems
and product damage.
NOTE: Remove breather/fi ll plug
slowly to relieve any pressure in
reservoir.
Hydraulic Fluid
• WESTERN High Performance
®
Fluid rated to –25°F (–32°C) or
other fl uid conforming to Military
Specifi cation MIL-H-5606A,
such as Mobil Aero HFA or Shell
AeroShell Fluid 4.
®
Fluid Capacity
• Unit Reservoir = 1-1/2 quarts
• System Total = 2-1/4 quarts
Solenoid Valve Spool Travel =
0.07" for three- and four-way valves
(S2, S3). Travel of two-way valve (S1)
spool is not detectable with voltage
applied to coil.
Lit. No. 41467, Rev. 01
Fluid Level
With the system attached to the
vehicle, activate the control. Lower the
blade to the ground and turn OFF the
control. Remove the fi ll plug. Fill the
reservoir to within 2-1/2" of the top of
the fi ll hole. Replace the fi ll plug.
Electrical System –
approximate values:
• Solenoid Coil Resistance =
7 ohm at room temperature
• Solenoid Coil Amperage Draw =
1.5A
• Motor Relay Coil Resistance =
16–17 ohm
• Motor Relay Amperage Draw =
0.7A
• Motor Amperage Draw = 100A at
1650 psi ± 50 psi
• Switched Accessory Lead Draw
= 0.75A
3-Port Module
Vehicle Control Harness Fuse Size
• Park/Turn – 10A (mini)
• Control – 10A (mini)
4-Port Module
(automotive-style)
• Park/Turn – 15A
• Control – 7.5A
Tools required to service
the electrical and hydraulic
systems:
• long slender needle-nose pliers
• fl at screwdriver
• deep socket: 7/8"
• 10 mm socket
• sockets and combination
wrenches: 5/16" thru 7/8",
1-1/16", 1-1/8"
• 1/4" socket or nut driver
• 12V test light
• torque wrench (in-lb / ft-lb)
• Allen wrench set
• 600 psi pressure gauge
w/adapter fi ttings
Fastener Torque
MUX Straight Blade w/Scrape Lock Hydraulic Unit Torque Chart
Location Fastener Size
Pump Cap Screws 5/16-18 x 2-1/4
Motor Terminals (+ and –) M6 Nut
Motor to Manifold Cap Screws M5 x .8
Reservoir Screws #10-24 x 5/16
Solenoid Valves 7/8 Hex Head
Coil Nuts 3/4 Hex Head Jam Nut
SAE O-Ring Plugs 1/8 or 5/32 Internal Hex
Hydraulic Unit Mount Bolts 3/8-16 x 1
Check Valves 7/8 Hex Head
Motor Relay Small Terminals #10-32 Nut
Motor Relay Large Terminals 5/16-24 Nut
Motor Relay Mount Screws 1/4-20 x 3/8
Plow Module Mount Screws 1/4-20 x 3/8
* Torque with low-strength thread locker
• 3000 psi pressure gauge
w/adapter fi ttings
• fl ashlight
• pick set
• hammer
• digital volt/ohm meter
• pencil magnet
• adjustable-pin spanner wrench
(capacity range 2-1/2", 1/4" pin dia.)
Available from your WESTERN outlet:
®
• Hydraulic Pressure Test Kit
(PN 56679)
• Multiplexed Hyd. Diagnostic
Harness (PN 29290-2)
• Motor Bearing Sleeve Repair Kit
(PN 64589)
• Pump Shaft Seal Repair Kit
(PN 28856)
Torque
150–160 in-lb
25–35 in-lb
35–45 in-lb*
30–35 in-lb*
19–21 ft-lb
48–60 in-lb
55–65 in-lb
22–25 ft-lb
19–21 ft-lb
15 in-lb max
35 in-lb max
75–85 in-lb
60–70 in-lb
April 15, 2021
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