Maintenance - Section 4 OM4012.2 Page 4-18 Reciprocating Pump Automatic Lube System Injectors (SL-1 Series " H") Injector Specifications a. Each lube injector services only one grease point. In case of pump malfunction, each injec- tor is equipped with a covered grease fitting to allow the use of external lubricating equipment. b. Injectors are available in banks of two, three, four and five as well as single replacement units. c. Injector output is adjustable: Maximum output = 0.08 in 3 (1.31 cc). Minimum output = 0.008 in 3 (0.13 cc). d. 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) FIGURE 4-5. TYPE SL-1 INJECTOR (SINGLE) 1. Adjusting Screw 11. Spring Seat 2. Locknut 12. Plunger 3. Piston Stop Plug 13. Viton Packing 4. Gasket 14. Inlet Disc 5. Washer 15. Viton Packing 6. Viton O-Ring 16. Washer 7. Injector Body Assy. 17. Gasket 8. Piston Assembly 18. Adapter Bolt 9. Fitting Assembly 19. Adapter 10. Plunger Spring 20. Viton Packing 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 4-5) counterclock- wise to increase lubricant amount delivered and clock- wise to decrease the lubricant amount. NOTE: The Piston Assembly (8) has a visible indicator pin at the top of the assembly to verify the injector operation . 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 .
FIGURE 4-5A. INJECTOR (MANIFOLD TYPE)