Komatsu 930E-2, Shop Manual

Page: 708 / 739

INJECTORS (SL-1 Series “H”)
Injector Specifications
•
Each lube injector services only one grease
point. In case of pump malfunction, each injector
is equipped with a covered grease fitting to allow
the use of external lubricating equipment.
•
Injector output is adjustable:
Maximum output = 0.08 in
3
(1.31 cc).
Minimum output = 0.008 in
3
(0.13 cc).
•
Operating Pressure:
Minimum - 1850 psi (12 755 kPa)
Maximum - 3500 psi (24 133 kPa)
Recommended - 2500 psi (17 238 kPa)
Maximum Vent Pressure - (Recharge)
600 psi (4 137 kPa)
Injector Adjustment
The injectors may be adjusted to supply from 0.008 in
3
to 0.08 in
3
(0.13 cc to 1.31 cc) of lubricant per injection
cycle. The injector piston travel distance determines
the amount of lubricant supplied. This travel is in turn
controlled by an adjusting screw in the top of the
injector housing.
Turn the adjusting screw (1, Figure 3-6) counterclock-
wise to increase lubricant amount delivered and clock-
wise to decrease the lubricant amount.
When the injector is not pressurized, maximum injector
delivery volume is attained by turning the adjusting
screw (1) fully counterclockwise until the indicating pin
(8) just touches the adjusting screw. At the maximum
delivery point, about 0.38 inch (9.7 mm) adjusting
screw threads should be showing. Decrease the deliv-
ered lubricant amount by turning the adjusting screw
clockwise to limit injector piston travel. If only half the
lubricant is needed, turn the adjusting screw to the
point where about 0.19 inch (4.8 mm) threads are
showing. The injector will be set at minimum delivery
point with about 0.009 inch (0.22 mm) thread showing.
NOTE: The above information concerns adjustment of
injector delivery volume. The timer adjustment should
also be changed, if overall lubricant delivery is too little
or too much. Injector output should NOT be adjusted
to less than one-fourth capacity.
NOTE: The Piston Assembly (8) has a visible indicator
pin at the top of the assembly to verify the injector
operation.
SYSTEM CHECKOUT
To check system operation (not including timer), pro-
ceed as follows:
1. Turn keyswitch “ON” and start the engine.
2. Actuate the Lube System Test Switch at the
reservoir/pump assembly on the front bumper.
3. The motor and pump should operate until the
system attains 2500 psi (17 237 kPa).
4. Once the required pressure is achieved, the pump
motor should turn off and the system should vent.
5. Check for pump, hose or injector damage or
leakage with the system under pressure.
6. After checking system, shutdown engine, observ-
ing normal precautions regarding high voltage
present in the propulsion system before attempt-
ing to repair lube system.
FIGURE 3-6. TYPE SL-1 INJECTOR
1. Adjusting Screw
2. Locknut
3. Piston Stop Plug
4. Gasket
5. Washer
6. Viton O-Ring
7. Injector Body Assy.
8. Piston Assembly
9. Fitting Assembly
10. Plunger Spring 11. Spring Seat
12. Plunger
13. Viton Packing
14. Inlet Disc
15. Viton Packing
16. Washer
17. Gasket
18. Adapter Bolt
19. Adapter
20. Viton Packing
P3- 8 Automatic Lubrication System P03018 4/00