Injectors - Komatsu 730E Operation & Maintenance Manual

OM4035.2 02/03
Automatic Lube System
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 exter-
nal lubricating equipment.
• Injector output is adjustable:
Maximum output = 0.08 in
Minimum output = 0.008 in
• Operating Pressure:
Minimum - 1850 psi (12 755 kPa)
Maximum - 3500 psi (24 133 kPa)
Recommended - 2500 psi (17 238 kPa)
Maximum Vent Pressure - (Recharge)
Injector Adjustment
The injectors may be adjusted to supply from 0.008 in
3
to 0.08 in (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 con-
trolled by an adjusting screw in the top of the injector
housing.
Turn the adjusting screw (1, Figure 3-8) 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 delivered
lubricant amount by turning the adjusting screw clock-
wise 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.
3
(1.31 cc).
3
(0.13 cc).
600 psi (4 137 kPa)
3
FIGURE 3-8. 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
NOTE: The Piston Assembly (8) has a visible indicator
pin at the top of the assembly to verify the injector oper-
ation.
Maintenance - Section 4
Page 4- 21
12. Plunger
13. Viton Packing
14. Inlet Disc
15. Viton Packing
16. Washer
17. Gasket
18. Adapter Bolt
19. Adapter
20. Viton Packing