Q: I have a Prince product, how do I identify what the model # is?
A: The 1st thing you need to do is determine if you have a Prince hydraulic cylinder, valve, pump, or motor.
Prince typically pin stamps directly on the product or attaches a tag with the model #, date of manufacture, and a serial # or some combination that will include the model #.
Cylinder: On the cylinder tube approximately 90 degrees to the extend port (base end of the cylinder), in a counter clock wise position you should be able to find the pin stamp. Do look closely, depending on the paint thickness or layers of paint it may be difficult to see (you may have to use a flash light or a wire brush to remove some of the paint).
Pumps: On the SP series pumps, this information will be pin stamped on the body of the pump. These are aluminum bodies, so it is usually easy to find the pin stamping.
Aluminum PTO Pump: On the aluminum PTO Pump you will find the pin stamping on the body of the PTO. Keep in mind that depending on the paint, it maybe difficult to find, so look closely, it is there.
Cast Iron PTO Pump: On the cast iron PTO Pump you will find a tag, it is attached to the opposite side of the torque arm mounting area.
Motors: With the motor shaft facing you and the ports up, you will find the tag on the right side of the port pad.
Valves: Prince has a few locations where valves will get pin stamped. Prince typically pin stamps the model # and date of manufacture. You will also find casting #’s (C-XXX or HCI-PRINCE) on the valves, so if you are not able to find the pin stamping, this will give you a start in identifying what valve series you have. Please refer to the valve casting # identification section.
Model # Series |
Where the pin stamp is located |
RD-400 |
Hex plug end cap on controlled flow end |
RD-500 |
Hex plug end cap |
RD-900 |
On non-handle end with ports up, model code on surface directly above spool, date code on surface directly below spool. |
RD-1000 |
On face of adjusting plug |
RD-1400 |
Hex plug end cap |
RD-1500 |
Model No. and Date Code on right end cap, orifice size on left cap (ratio and orifice size of left cap if ratio is not 50:50) |
RD-1600 |
Top of body (same surface as the “IN”, “CYL” & “PP” detail) |
RD-1800 |
Top (Tank port side) of mach body |
RD-1900 |
Hex plug end cap |
RDRS-100 |
Hex plug end cap |
RDRS-1900 |
Hex plug end cap |
RD-2500 |
End plate opposite the handle |
RD4100 SERIES |
End cap opposite the handle |
RD5100 SERIES |
End cap opposite the handle |
RD5200 SERIES |
End cap opposite the handle |
RD5300 SERIES |
End cap opposite the handle |
RV |
On hex flats of relief cartridge |
SS |
On end of valve on machined surface opposite handle end |
SV ASSEMBLIES |
Outer machined face of inlet |
SV INLET |
Outer machined face |
SV OUTLET |
Outer machined face |
SV WORK SECTIONS |
End cap opposite the handle |
SVX…-TXXX TANDEM SOLENOID |
Machined face on side of actuator body nearest the B port |
Q: Ok, I can’t find the model # on the valve but I did find the casting #. What valve do I have?
A: The below chart will tell you what valve series the casting # is used in. You will still need to determine the other valve attributes such as port size, relief setting, and others. You can find additional information on each of the below valve series by referring to the specific catalog pages or parts manuals.
Valve Casting Number |
Prince Valve Series or Valve Family |
C-454 |
RD-1000 |
C-454 |
RD-1500 |
C-454 |
RD-1500-AB |
C-454 |
RD-200 |
C-454 |
RD-300 |
C-454 |
RD-300-AB |
C-454 |
RD-400 |
C-454 |
RD-400-R |
C-454 |
RD-500 |
C-454 |
RD-800 |
C-454 |
RD-800-CB |
C-454 |
RD-900 |
C-454 |
RD-600 |
C-454 |
RD-700 |
C-454 |
RD-1100 |
C-460 |
RD-1400 |
C-465 |
RD-1900 |
C-465 |
RD-1900-BSPP |
C-465 |
RDC-1900 |
C-465 |
RDRS-1900 |
C-481 |
RD-5100 |
C-482 |
RD-5200 |
C-483 |
RD-5300 |
C-503 |
RD-100 |
C-503 |
RDRS-100 |
C-503 |
RDC-150-16 |
C-505 |
LS-3000 |
C-505 |
LSR-3000 |
C-509 |
RV |
C-511 |
RD-2500 |
C-512 |
DRV |
C-569 |
DS |
C-570 |
SS |
C-575 |
SVW |
C-576 |
SVI |
C-577 |
SVE |
C-589 |
SVH |
C-589 |
SVIM |
C-590 |
SVL |
C-623 |
ALL SV "S" SOLENOIDS |
C-625 |
SVR |
C-626 |
AK-597 |
C-626 |
PM-SC-10 |
C-627 |
SVM |
C-627 |
SVF |
C-630 |
20P |
C-630 |
20B |
C-631 |
20I |
C-632 |
20E |
C-632 |
20LE |
C-635 |
ALL SV "T" SOLENOIDS |
C-637 |
20T |
C-637 |
20TM |
C-638 |
20L |
C-656 |
SVS |
C-662 |
20IM |
C-664 |
HC-V-S29 |
C-664 |
HC-V-S30 |
C-685 |
RD4100 |
C-689 |
HC-V-AA19 LVT |
C-689 |
HC-V-AA20 LVT |
C-689 |
HC-V-AB24 LVT |
C-689 |
HC-V-AB25 LVT |
C-689 |
HC-V-AB32 LVT |
C-689 |
HC-V-AD3 LVT |
C-689 |
LVT1GR |
C-689 |
LVTIGB |
C-689 |
LVT1BB |
C-690 |
OLD LVR |
C-713 |
HC-V-AA46 FORD NEW HOLLAND |
C-713 |
HC-V-AE10 |
C-713 |
HC-V-BE37 |
C-714 |
HC-V-AB10 LVT |
C-714 |
HC-V-AB12 LVT |
C-714 |
HC-V-AB20 LVT |
C-714 |
HC-V-AB21 LVT |
C-714 |
HC-V-AB28 LVT |
C-714 |
HC-V-AB29 LVT |
C-714 |
HC-V-AE35 LVT |
C-714 |
LVT1RG |
C-714 |
LVT1BG |
C-732 |
HC-V-AE26 |
C-732 |
HC-V-AE5 |
C-732 |
HC-V-BC02 |
C-732 |
HC-V-AE6 |
C-760 |
SVIF |
C-768 |
LVS |
C-814 |
20LP |
C-834 |
LVR |
C-860 |
LVS NO RELIEF |