4 — MAINTENANCE
4-7
Flow Restrictor Valve Replacement
WARNING
Closely read and adhere to the following instructions whenever you remove and
install the flow restrictor valve. Failure to properly install the flow restrictor valve
can result in serious injury or death to personnel or damage to the equipment.
If the flow restrictor valve, Figure 4-6, needs to be removed or replaced, it is important
that it be properly reinstalled. The valve will be marked either with an arrow or with the
word “IN”.
If marked with an arrow, the arrow must point away from the hydraulic cylinder port. If
marked with the word “IN”, the end of the valve marked “IN” must be toward the hy-
draulic cylinder port.
Only a 1/4 inch NPT hydraulic elbow fitting should be connected between the hydraulic
cylinder port and the flow restrictor valve. Improper installation of the flow restrictor
valve or use of the wrong size hydraulic elbow fitting will allow varying rates of descent
and may result in near free-fall in case of hydraulic hose failure.
Figure 4-6. Flow Restrictor Valve
