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OM4006.2 10/98
Automatic Lube System
Figure 4-6. Lube Injector Groups
Group
No.
Injector Point of Lubrication
Lube
of Inj.
R.H. Front Suspension, Top
''A''
3
R.H. Front Suspension, RR ''A''-Arm
R.H. Front Suspension, FRT ''A''-Arm
L.H. Front Suspension, Top
''B''
3
L.H. Front Suspension, RR ''A''-Arm
L.H. Front Suspension, FRT ''A''-Arm
R.H. Steering Cylinder, Spindle
''C''
3
R.H. Steering Rod, Spindle
R.H. Front Suspension, BTM ''A''-Arm
L.H. Steering Cylinder,Spindle
''D''
3
L.H. Steering Rod, Spindle
L.H. Front Suspension, BTM ''A''-Arm
R.H. Steering Cylinder, FRAME
L.H. Steering Cylinder, FRAME
''E''
5
L.H. Steering Rod, PIVOT
R.H. Steering Rod, PIVOT
CENTER Steering Pivot, FRAME
Rear Axle, BTM L.H. BAR FRAME
''F''
3
L.H. Hoist Cylinder, FRAME
Transmission, FRT MOUNT
Rear Axle, TOP FRT BAR FRAME
''G''
3
Rear Axle, BTM R.H. BAR FRAME
R.H. Hoist Cylinder, FRAME
L.H. Rear Suspension, FRAME
''H''
3
L.H. Hoist Cylinder, BODY
L.H. BODY PIVOT
Rear Axle, TOP SWAY BAR, FRAME
R.H. Rear Suspension, FRAME
''J''
4
R.H. Hoist Cylinder, BODY
R.H. BODY PIVOT
L.H. Rear Suspension, AXLE
''K''
3
Rear Axle, TOP FRT BAR, AXLE
Rear Axle, TOP SWAY BAR, AXLE
Rear Axle, BTM R.H. BAR, AXLE
''L''
3
L.H. Rear Suspension, FRAME
R.H. Rear Suspension, AXLE
3. Pump Cycle Timer (7, Figure 4-5) [also called a
''Flasher'' timer, because it contains an LED that
illuminates when there is power going to SV2]:
The Pump Cycle Timer mounts on SV2 solenoid
and generates a timed pulse signal which causes
the solenoid valve to move, alternately. The alter-
nating movement of the valve, changes the direc-
tion of hydraulic fluid flow from the top of the pump
cylinder to the bottom, and vice versa, causing the
grease pump piston to reciprocate, or ''pump''.
4. Grease Reservoir: For the 530M, the Cannister or
Reservoir (6, Figure 4-5) is mounted on the right
deck structure to the right of the hydraulic cabinet
just above the right front suspension.
The reservoir has an approximate capacity of 7.7
gal. or 60 lbs. (27 kg) of grease.
5. Vent Valve (11, Figure 4-5): When SV1 solenoid is
energized, hydraulic pressure closes the Vent
Valve, and also causes the pump to cycle. The
pump cycles until SV1 solenoid is de-energized.
When this occurs, hydraulic pressure is removed,
causing the Vent Valve to open.
The grease pressure drops to 0, and the injectors
recharge for their next output cycle.
6. 24 VDC Solid State System Timer (Not Shown):
The Solid State System Timer sends out a 24 VDC
timed-interval signal to energize the solenoid
valves, causing the grease pump to operate. This
timer is mounted in the cab (in the housing under
the passenger seat) to insure temperature stabil-
ity. Its operating temperature range is -20°F to
131°F (-29°C to 55°C).
7. Lube Injectors (10, Figure 4-6): each injector de-
livers a controlled amount of pressurized lubricant
to a designated lube point.
Refer to Figure 4-6 for locations.
8. Safety Unloader Relief Valve (Not Shown); is lo-
cated on the back of the vent valve (11, Figure
4-5). The Safety Unloader Relief Valve is designed
to open if the pressure in the grease line rises to
approximately 4000 psi (27.5 MPa)* . If this valve
opens, the grease is expelled to atmospere.
*NOTE: This setting is not adjustable.
WARNING: Exceeding 3500 p.s.i. (24.1 MPa) will
damage components and/or cause components to
rupture, resulting in possible serious injury to any
nearby personnel.
Maintenance - Section 4
Page 4-15
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