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| Illustration 1 | g06336141 |
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View of the location of the auto lube components. (A) Auto lube motor and grease reservoir tank (B) Front left-hand injector groups (C) Front right-hand injector groups (D) Rear injector groups | |
Illustration 1 shows the location of the components in the lubrication system.
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| Illustration 2 | g03676126 |
| (1) Auto lube pump group and grease reservoir tank | |
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| Illustration 3 | g03715532 |
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View (AA) ( 2) Auto lube pump motor (3) Grease reservoir tank (4) Check valve (5) Vent valve and solenoid (6) Pressure gauge (7) Relief valve adjustment | |
The auto lube pump group is on the platform behind the cab. Updates have been added to the system.
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| Illustration 4 | g06336142 |
Level switch (17) has been added to grease reservoir tank (3).
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| Illustration 5 | g06336430 |
The fast fill center is on the outside of the left frame near the front, left wheel. Toggle switch (18), and illuminated button (19) have been added to the fast fill center. The three new parts are used when the grease reservoir tank is filled by a service technician.
A service technician begins filling grease reservoir tank (3) at the service center. At the same time, the service technician holds up the toggle switch (18) in the ACTIVE ON position indicated by the decal. When the grease in the reservoir tank gets to a specific level, the grease moves level switch (17) up. An electrical circuit is completed and illuminates button (19) in the service center, indicating that the tank is full. The service technician stops filling the grease reservoir tank and moves the toggle switch down to the CIRCUIT OFF position.
The light in the illuminated button can be tested. Next to the button is a decal that states "Press To Test". Press the button. The light in the illuminated button should glow showing the light operates.
Automatic Lubrication Operation
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| Illustration 6 | g03676308 |
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View of the electrical system (2) Auto lube motor (5) Auto lube vent valve solenoid (8) Auto lube test switch (9) Auto lube timer (10) Auto lube pressure switch (11) Auto lube pressure relay (12) Auto lube relay (14) Auto lube alarm relay (15) Auto lube alarm reset switch (16) Auto lube alarm indicator | |
When the key switch is turned to the ON position, the auto lube system is powered up. The lube cycle begins with auto lube timer (9), auto lube pressure switch (10), and auto lube pressure relay (11). Current is supplied to auto lube pump group (1). At the same time, solenoid (5) is energized. The vent valve that is attached to the solenoid closes preventing lubricant from flowing back into reservoir (3). Auto lube pump group (1) begins dispensing lubricant through the lubrication injectors.
Auto lube pump group (1) is driven by the rotary motion of auto lube pump motor (2). Rotary motion is converted to reciprocating motion through an eccentric crank mechanism, causing the pump cylinder to move up and down. Lubrication pump group (1) is a positive, double acting displacement pump that outputs lubricant during both the up stroke and the down stroke. Automatic lubrication pump motor (2) has an integral speed control capable of reducing pump speed to 10% of maximum value.
During the down stroke, the pump cylinder is extended into the lubricant. Through the combination of physical agitation and vacuum generated in the chamber of the pump cylinder, the lubricant is forced into the pump cylinder. Simultaneously, lubricant is discharged through the outlet of the pump. The volume of lubricant during intake is twice the amount of the volume of lubricant during output in one cycle. During the upstroke, the inlet check valve closes. One half of the lubricant taken in during the previous stroke is transferred through check valve (4) to the outlet port.
When all the bearings have received lubricant, the pressure in the system rises which actuates the auto lube pressure switch. When the auto lube pressure switch actuates, the auto lube pressure relay is energized which cuts off the current to lube motor (2). Solenoid valve (5) is de-energized. The vent valve attached to the solenoid opens, allowing excess pressure and lubricant to flow back into reservoir (3). The system pressure vents. The auto lube pressure switch no longer senses high pressure. Auto lube pump group (1) stops. Auto lube timer (9) is reset. The auto lube system begins timing toward the next lube cycle.
For information on the electrical system, refer to Schematic, "Electrical System".
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| Illustration 7 | g06336528 |
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A view of injector group on the RH side front axle (1) Lubricant supply line (2) Lubrication injectors (A) To bottom of kingpin (B) To tie rod pin (C) To steering cylinder pin (base end) at steering arm (D) To top of kingpin (E) To inboard pan hard rod pin (F) To outboard pan hard rod pin (G) To rear bottom trailing rod pin (H) To front bottom trailing rod pin (J) To front top trailing rod pin (K) To rear top trailing rod pin (L) To top suspension pin (M) To bottom of suspension pin | |
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| Illustration 8 | g06336535 |
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A view of injector bank on the LH side front axle (1) Lubricant supply line (2) Lubrication injectors (A) To bottom of kingpin (B) To tie rod pin (C) To steering cylinder pin (base end) at steering arm (D) To top of kingpin (E) To inboard pan hard rod pin (F) To outboard pan hard rod pin (G) To rear bottom trailing rod pin (H) To front bottom trailing rod pin (J) To front top trailing rod pin (K) To rear top trailing rod pin (L) To top suspension pin (M) To bottom of suspension pin | |
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| Illustration 9 | g06336566 |
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A view of injector group on the rear support assembly (1) Lubricant supply line (2) Lubrication injectors (A) To LH side body mount bushing (B) To LH side hoist cylinder (top) (C) To RH side rear suspension cylinder (top) (D) To LH hoist cylinder (bottom) (E) To LH rear suspension cylinder (top) (F) To RH side hoist cylinder (top) (G) To LH side of rod assembly (H) To RH side body mount bushing (J) To RH side hoist cylinder (bottom) | |
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| Illustration 10 | g06336834 |
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A view of injector bank on the weldment axle assembly (rear) (1) Lubricant supply line (2) Lubrication injectors (10) Pressure switch (A) To RH side rear suspension (bottom) (B) To RH side of rod assembly (C) To LH side rear suspension (bottom) | |
There are 13 automatic lubrication injector groups (2) on the machine. Four lubrication injector groups are on each of the front left and right corners of the machine on the front axle. Refer to Areas (B) and (C) in Illustration 1. Two injector groups and the pressure switch are on the outside left side of the rear axle assembly. Three injector groups are on the rear left side of the center frame support. Refer to Area (D) in Illustration 1. Lubrication injectors (2) part of each injector group containsmanifolds connected to the lubrication supply line (1). Lubrication supply line (1) is connected to the autolube pump group and reservoir. Refer to Area (A) in Illustration 1.
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| Illustration 11 | g01261109 |
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SL-V Lubrication injector (14) Adjustment screw (15) Stop (16) Indicator stem (17) Discharge chamber (18) Piston (19) Inlet chamber (20) Outlet port (21) Passage (22) Slide valve (23) Slide valve port (24) Lubricant supply port | |
When autolube pump group (1) is activated, the SL-V lubrication injectors (11) will cycle one time. A complete cycle for the injectors consists of four stages.
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| Illustration 12 | g01261098 |
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Stage 1 (16) Indicator stem (17) Discharge chamber (18) Piston (21) Passage (22) Slide valve (23) Slide valve port | |
Measuring piston (18) is in the normal position or the rest position. Discharge chamber (17) is filled with lubricant from the previous cycle. Under the pressure of incoming lubricant, slide valve (22) directs lubricant to both sides of measuring piston (18) through passage (21). Slide valve port (23) is closed in this position which prevents piston (18) from moving. Indicator stem (16) is at the innermost position in the lubrication cycle.
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| Illustration 13 | g01261105 |
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Stage 2 (17) Discharge chamber (18) Piston (19) Inlet chamber (20) Outlet port (21) Passage (22) Slide valve (23) Slide valve port (24) Lubricant supply port | |
Lubricant flow from lubricant supply line (8) enters lubrication injector (10) through lubricant supply port (24). Pressure increases because piston (18) cannot move. As a result, slide valve (22) moves into the position that is shown. This stops flow to discharge chamber (17) through passage (21). This position also opens slide valve port (23) which allows lubricant to flow through outlet port (20) to the bearing. Pressure from lubricant supply line (8) continues to apply pressure to the lower portion of measuring piston (18). Because lubricant can now flow out of discharge chamber (17), the internal pressure of inlet chamber (19) becomes greater. As a result, measuring piston (18) moves upward.
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| Illustration 14 | g01261106 |
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Stage 3 (14) Adjustment screw (15) Stop (16) Indicator stem (18) Piston | |
Movement of piston (18) is shown. This movement is caused by the pressure on the lower side of piston (18). As piston (18) moves, lubricant is pushed out to the bearing. Indicator stem (16) will move up against stop (15) in adjusting screw (14) when all lubricant has been delivered to the bearing.
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| Illustration 15 | g01261107 |
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Stage 4 (17) Discharge chamber (18) Piston (19) Inlet chamber (21) Passage (22) Slide valve (23) Slide valve port | |
As the pressure in supply line (8) decreases to
When autolube pump group (1) is activated, the SL-1 lubrication injectors (10) will cycle one time. A complete cycle for the injectors consists of four stages.
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| Illustration 16 | g01988359 |
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Stage 1 (25) Measuring chamber (26) Piston for the injector (27) Outlet port (28) Valve port (29) Slide valve (30) Manifold (31) Spring (32) Discharge chamber (33) Passage (34) Supply port for the lubricant | |
Piston (26) is in the normal position or the rest position. Discharge chamber (32) is filled with lubricant from the previous cycle. The pressure of the incoming lubricant is ready to open slide valve (29). The open slide valve will allow passage (33) to open. Passage (33) leads to measuring chamber (25).
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| Illustration 17 | g01988360 |
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Stage 2 (25) Measuring chamber (26) Piston for the injector (27) Outlet port (28) Valve port (29) Slide valve (30) Manifold (31) Spring (32) Discharge chamber (33) Passage (34) Supply port for the lubricant | |
When slide valve (29) opens passage (33), the lubricant enters measuring chamber (25) forcing the lubricant from discharge chamber (32) through outlet port (27). The lubricant then flows to the bearing or the pin that is being lubricated.
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| Illustration 18 | g01988361 |
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Stage 3 (25) Measuring chamber (26) Piston for the injector (27) Outlet port (28) Valve port (29) Slide valve (30) Manifold (31) Spring (32) Discharge chamber (33) Passage (34) Supply port for the lubricant | |
As piston (26) for the injector completes the stroke, the piston pushes slide valve (29) past passage (33) stopping the entry of lubricant into passage (33) and measuring chamber (25). Piston (26) and slide valve (29) remain in this position until the pressure at supply port (34) is vented.
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| Illustration 19 | g01988362 |
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Stage 4 (25) Measuring chamber (26) Piston for the injector (27) Outlet port (28) Valve port (29) Slide valve (30) Manifold (31) Spring (32) Discharge chamber (33) Passage (34) Supply port for the lubricant | |
After venting, spring (31) expands moving slide valve (29) so that passage (33) and discharge chamber (32) are connected by valve port (28). Further expansion of spring (31) causes piston (26) to move forcing the lubricant in measuring chamber (25) through passage (33) and valve port (28) refilling discharge chamber (32). The injector is now ready for the next cycle.
The SL-V injector may be used as a direct replacement for the SL-1 injector. Use a 9X-2027 Washer with the manifold bolts when you replace an SL-1 injector with an SL-V injector.