Our department has a 1979 Howe Grumman Aerial apparatus. I am currently in the process of overhauling the truck and have run into an issue with the electric shift unit. The shift arm has a pin located at the tip/end, which is supposed to seat in the pivot plate, which activates the pump. I have removed the actuator to gain access to the arm assembly and found (surprisingly) there was no damage to any of the parts. I did purchase a new shift arm and shift override spring from Waterous, in the anticipation that they would need replaced.
The issue comes in when the engine is started and or the truck moves. During this time, the shift arm and associated pin lose its seating with the pivot plate, thus forcing me to use the shift override option on the pump panel.
There is a larger pin located in the electric actuator (seen once removed), that is attached at the center, making it swing freely when detached from the pump assembly. This pin seats in the actuator lever, which is attached the the shift shaft. Is this pin supposed to move freely?
Any help on this is greatly appreciated, as we are planning to have the pump tested this year.
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Thread: Electric Shift Actuator
05-22-2011, 12:16 AM #1
- Join Date
- May 2011
Electric Shift Actuator
05-22-2011, 04:43 PM #2
- Join Date
- May 2006
- Bryn Athyn, Pa.
firstname.lastname@example.org with a fax number and I'll be happy to fax you that or anything else I have. Also, if you haven't done so, call Waterous Co.'s tech support folks at 651 450 5200. There's a bunch of real savvy people on the other end of your phone who are happy to answer just about any question you can throw at them.
05-24-2011, 05:57 PM #3
- Join Date
- Aug 2000
- South St. Paul, MN
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