OM4006.2 10/98 Maintenance - Section 4 Automatic Lube System Page 4-15 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. Figure 4-6. Lube Injector Groups Group Lube No. of Inj. Injector Point of Lubrication ‘‘A’’ 3 R.H. Front Suspension, Top R.H. Front Suspension, RR ‘‘A’’-Arm R.H. Front Suspension, FRT ‘‘A’’-Arm ‘‘B’’ 3 L.H. Front Suspension, Top L.H. Front Suspension, RR ‘‘A’’-Arm L.H.
Front Suspension, FRT ‘‘A’’-Arm ‘‘C’’ 3 R.H. Steering Cylinder, Spindle R.H. Steering Rod, Spindle R.H. Front Suspension, BTM ‘‘A’’-Arm ‘‘D’’ 3 L.H. Steering Cylinder,Spindle L.H. Steering Rod, Spindle L.H. Front Suspension, BTM ‘‘A’’-Arm ‘‘E’’ 5 R.H. Steering Cylinder, FRAME L.H. Steering Cylinder, FRAME L.H. Steering Rod, PIVOT R.H. Steering Rod, PIVOT CENTER Steering Pivot, FRAME ‘‘F’’ 3 Rear Axle, BTM L.H. BAR FRAME L.H. Hoist Cylinder, FRAME Transmission, FRT MOUNT ‘‘G’’ 3 Rear Axle, TOP FRT BAR FRAME Rear Axle, BTM R.H. BAR FRAME R.H. Hoist Cylinder, FRAME ‘‘H’’ 3 L.H. Rear Suspension, FRAME L.H. Hoist Cylinder, BODY L.H. BODY PIVOT ‘‘J’’ 4 Rear Axle, TOP SWAY BAR, FRAME R.H.
Rear Suspension, FRAME R.H. Hoist Cylinder, BODY R.H. BODY PIVOT ‘‘K’’ 3 L.H. Rear Suspension, AXLE Rear Axle, TOP FRT BAR, AXLE Rear Axle, TOP SWAY BAR, AXLE ‘‘L’’ 3 Rear Axle, BTM R.H. BAR, AXLE L.H. Rear Suspension, FRAME R.H. Rear Suspension, AXLE