TM 1-1680-320-13&P
0034 00
SPEED REDUCTION LIMIT SWITCH (SW4)
1. Install cable hook assembly in accordance with WP 0015 00.
2. Mark cable 21 inches from cable hook assembly.
3. Apply power (28 vdc).
NOTE
SPEED REDUCTION LIMIT SWITCH (SW4) (3), Cam No. 4, reduces cable
speed to 15 FPM when cable hook assembly is approximately 18-24 inches from
full stow.
4. Retract cable (position control pendant CABLE UP/DOWN switch to UP) until cable mark is aligned with
boomhead actuator assembly.
5. Disconnect power.
6. Adjust SW4 cam 4 (1) by loosening SW4 cam 4 screw (2) and rotate CAM clockwise (as viewed from gear
side), until SW4 cam 4 lobe contacts and activates SW4 limit switch (listen for/feel click). Tighten cam screw.
7. Apply power (28 vdc)
8. Extend cable (position control pendant CABLE UP/DOWN switch to DOWN) approximately 10 ft.
CAUTION
Observe cable travel speed during following step to ensure that cable travel
speed reduction occurs within 18-24 inches of boomhead actuator assembly. If
cable travel speed is not reduced when cable hook assembly is within 18-24
inches of boomhead actuator assembly release control pendant switch.
9. Retract cable (position control pendant CABLE UP/DOWN switch to UP) until SW4 activates and cable travel
speed is reduced to 15 FPM.
10. Verify that cable travel speed is reduced when cable hook assembly is within 18-24 inches of boomhead
actuator assembly.
11. If cable travel speed is not reduced when cable hook assembly is within 18-24 inches of boomhead actuator
assembly, repeat steps 8-10.
12. Disconnect power.
0034 00-18
