LOAD KING 35-127 M, Operator'S Manual, Page: 171 / 216

171
Specifications
Pumps and Function Speeds
The pumps used on the Load King Series Boom Truck are fixed/positive displacement of the rotary vane
type� To produce the proper amount of flow to run the functions at full speed, the pump shaft must be
turning at 2,300 RPM�
The required speed for the pump is very important when testing the unit speeds and checking or handling
maximum loads� Remember also that pump speed and engine speed are not always the same� For
instance, if the truck transmission is equipped with a 115%PTO, the required engine speed to achieve
the desired pump RPM would be approximately 2,000 RPM� It is very important that you know what the
ratio of the PTO is on the unit being serviced�
When involved in troubleshooting a unit that is believed to have slow functions, it is important to know
the pump is receiving the proper RPM and how much flow to expect from the pump� The following charts
will allow you to accurately test the flow of the pump, as well as determine what is the proper speed of
the functions on the unit�
SYSTEM FLOWS
GPM @ 1,200 RPM GPM @ 2,300 RPM FUNCTION
20 GPM 38 GPM WINCH
14 GPM 26 GPM BOOM
5 GPM 9�5 GPM SWING
FUNCTION SPEEDS
The following chart is a list of the speeds you can expect from the RS Boom Truck� All speeds are noted
as being one (1) complete cycle� For instance, the swing time is for one 360° rotation, (stop to stop) at
the full 2,300 RPM - and all times are in seconds�
MODEL 35-127 M
SWING 60 Sec
EXTEND 150 Sec
RETRACT 55 Sec
BOOM UP 44 Sec
BOOM DOWN 26 Sec
WINCH SPEED
Low Speed)
TULSA BRADEN
93 FPM 93 FPM
WINCH SPEED
(Hi Speed)
177 FPM 211 FPM
NOTE:
Winch speeds based on 2,300 pump RPM and 3rd wrap on the winch drum with full load.
Speeds will be higher with lower loads.