Farr HD8625 - Page 32

2.16
hD8625 8-
5
/
8
” 35K Tong
Technical Manual
Valve Operation(Continued):
LIFTCYLINDER
Thisisadirect-actingvalve.Pushingthevalvehandleforwardwillcausetheliftcylindertolowerthetongvertically.Pullingthevalve
handletowardtheoperatorwillcausetheliftcylindertoliftthetong.
IllustratIon 2.g.2: tong lIft CylInDer Control valve
MOTORSPEED
Thisvalvesets thespeedofthe two-speedmotor. PullingthemotorspeedcontrolallthewayoutsetsthemotorspeedtoLOW.
MaximumtorqueisonlyavailablewhenthemotorspeedissettoLOW.Pushingthevalvehandletowardsthecentreofthetongsets
themotorspeedtoHIGH,whichisusefulforrapidlyun-threadingbrokenconnections.
IllustratIon 2.g.3: tong motor sPeeD Control valve
seTup & operaTion