Wednesday, September 23, 2015
Thursday, July 23, 2015
Friday, November 14, 2014
How to assemble a SV or Series 20 Prince Manufacturing Corporation Stack Valve
Please visit Prince Manufacturing Corporations YouTube Channel to view the video of these guidelines.
Click HERE to see our SV (12 gpm) and Series 20 (20 gpm) Stack Valve features.
SV Parts Manuals and Catalog pages to see both manual and solenoid operated.
Series 20 Parts Manuals and Catalog pages to see both manual and solenoid operated.
Make sure the environment is clean. Avoid areas near grinding or even dusty
areas.
Use a clean table that is free of dust and debris. The tools should be clean.
Leave the parts and sections in their plastic bags until
you are ready for them.
Gather and organize the parts needed for the assembly.
This will include:
An inlet
and an outlet casting
The
work sections. There can be up to 10 of
these per valve bank
The handle kit (one handle per work section)
The tie
rods kit
And the
o-rings.
Inspect the ground mating surfaces making sure they are
free of burrs or outward protrusions.
They must be free of scratches or dings in the mating
areas of the o-rings.
You’ll notice a light film of hydraulic oil on these
sections. It remains on the sections
because each valve is tested in our quality control program. That film keeps the metal in ideal condition
during shipping and should remain during assembly.
Lay the sections down, grooves up.
Put the o-rings in place after dipping each one in the
hydraulic fluid that resides in these plastic bags. This gives them a light oil film of
lubrication.
Pinched o-rings will cause leakage so make sure they are
fully seated. There are typically 4 o-rings for each grooved section;
for the SV family the larger o-ring goes in the round center groove and one of
the smaller rings is re-oriented to fit in the “race track” groove. The Series 20 family has orings of uniform
size. There may be extra orings in the
kits you receive.
Thread nuts on one end of the tie rods, leaving
approximately a quarter inch of threads extending from the nut and place lock
washers inside the nuts.
Insert the tie rods through the inlet casting holes or
the outlet casting holes…
depending on if you are assembling a Series 20 valve or
an SV model, then place that cover section on the table like this…
with the o-rings facing up. The grooves are on the Inlet Side of the
Series 20 sections and on the downstream side of the SV family.
Repeat the o-ring steps for one work section at a
time. Do not use grease or any lubricant
other than the hydraulic oil as that could cause leaking.
Lift the work sections and place them over the tie rods,
making sure the o-rings face up and make contact with a flat surface, avoiding
o-ring to o-ring contact.
After all work sections have been added, slide the inlet
or the outlet section over the tie rods with the threaded ports facing up.
Place lock washers on the tie rods, then lightly snug up the
nuts by hand.
Rotate the assembly to a horizontal position. In order to keep it level, place a spacer
block under the front edge of the inlet casting. Using a torque wrench on one end and a socket wrench on
the other, lightly tighten all three tie rods to about two-thirds torque.
Now you’re ready to progressively tighten the tie rod
nuts to 12 and a half foot pounds of torque on the 3rd and final
pass. (The Series 20 family of valves is tightened to 30 – 32 ft.-lbs.)
The handle assembly merely requires aligning the
holes…and inserting the bolts and a cotter key.
Use the handles or a handle fixture to shift all spools
fully in and out…making sure there is no binding.
If a spool binds or for spring-center operators, does not
return to center with spring force, loosen the nuts to about 1/3 torque and re-torque
progressively in two passes. If it still
binds you probably have a pinched o-ring or contamination between sections.
Sectional valves from Prince Manufacturing
Corporation…delivering to your bottom line through standard products and
customized solutions. Be sure to visit
our website www.princehyd.com
Tuesday, August 5, 2014
Syncing Series Cylinders
A
condition that can be experienced with a set of Series Cylinders (Master and
Slave(s)) is hydraulic cylinder creep, drift or movement when the hydraulic cylinder
is not in use. There can also be a
condition that Series Cylinders will become out of sync, or not extend and
retract at the same rate. Below is a
brief over view of some of the possible conditions that contribute to cylinder
creep, drift or the series cylinder getting out of sync. Keep in mind that the cylinders are only part
of the hydraulic circuit and there can be other contributing causes.
Cylinder rod measurement:
Cylinder
by-pass is a common field issue in Series Cylinder Systems, and a system review is required to determine
the problem.
-Extend
cylinders to the re-phasing position and lower hydraulics approximately
2".
-Then
immediately disconnect the hydraulics from the tractor.
-Measure
the length of the extended cylinder rod on each cylinder.
-Leave
implement to stand for some time, i.e. 3 hours.
-Re-measure
length of rods again and compare before and after measurements.
Please note: Variation can be expected if
implement is left over a period of time where the temperature change affects
the hydraulics by contraction or expansion. Warm to cooler temperatures
will cause the series cylinders to move. Make sure measurements are taken
at similar temperatures.
-When
the 'suspect' cylinder has been identified, it is important that dis-assembly is
carried out in a clean environment. The scoring of barrels and piston seals
will usually indicate contamination of some type has entered the system.
Air
in the system:
If
one or all of the cylinders drift down or the system is 'spongy' air is likely
present. Check for air bubbles going back to tank or by removing the return
line and catching oil in a clean container. With the rod clevises disconnected
and the cylinders vertical, hold in the re-phasing position until no aerated
oil flows. Hydraulic oil flow should be kept to a minimum minimize heat while
purging the air from the system.
Please note: Check the reservoir levels when
carrying out this exercise. Once the air has been pushed out of the system the
reservoir can become low. This can introduce air in to the system again.
Miss-staged
series cylinders:
Over
a period of time the series cylinders may become miss-staged due to seal
by-pass or differences between the rod side of the master cylinder and the
extend side of the slave cylinder(s). To restage the cylinders it is necessary
to extend them to the re-phasing position of for 30 seconds to 1 minute.
Retract and then extend the cylinders to ensure that they are working evenly
and staged with each other. It may be necessary to repeat this process.
Below are a few scenarios where the main or master cylinder drifts in retract and how this retract drift could cause the slave cylinder(s) to extend or retract.
Below are a few scenarios where the main or master cylinder drifts in retract and how this retract drift could cause the slave cylinder(s) to extend or retract.
Keep in mind that Prince Manufacturing Corporation provides custom designs to fit specific applications. Click here for details.
You may visit www.princehyd.com to view Prince Manufacturing Corporations standard Series Cylinders for further details. Our Series Cylinder parts manuals can be accessed by clicking here.
Wednesday, June 4, 2014
LS-3000-1 Log Splitter Pressure Release Detent Question
Question: On the LS-3000-1, what is the preset
PSI and what is it adjustable to on the pressure release detent for the
cylinder return?
Answer: The LS-3000-1 pressure release detent
is set to center the handle when the B port reaches a preset 1400 psi. The inlet relief of the LS-3000-1 log
splitter valve is preset at 2250psi @ 3 gpms and 105 degree F. We
recommend 250psi at a minimum between the inlet relief and pressure
relief. You would want your inlet to be 250psi higher than your pressure relief detent.
Below is the engineering spec section for for
reference:
Relief Valve Settings
Unless otherwise noted with order code
or on print, relief valve setting is to be 2250 psi* ± 100 psi @3 GPM ± 1
GPM. All other settings to have similar ranges unless otherwise noted on
assembly drawing or bill of material.
*The
Relief Pressure is defined as the pressure drop from the inlet of valve to the
outlet of valve. 3 GPM must be flowing across the relief at 2250 psi.Detent release pressure to be 1400 psi ± 150 psi at 3 GPM as standard setting. If the relief setting is less than 1650 psi, the detent release pressure is to be set at the relief setting at minimum minus 250 psi.
Wednesday, April 2, 2014
Hydraulic Power Beyond
This is a really good video done by someone with
a Kubota Loader. Very nice. Below are some links to the RD5000 2 spool valve
that he is installing.
http://www.princehyd.com/Products/Hydraulic-Valves/Mono-Block/25-Gallon-Two-Spoola Kubota Loader. Very nice. Below are some links to the RD5000 2 spool valve
that he is installing.
Monday, March 24, 2014
Genuine Replacement Seal Kits and Replacement Parts
“Prince Manufacturing knows
that you trust our products, processes and materials.
For this reason….. Do you risk
the integrity, operations and potential safety of your equipment by NOT
choosing to repair and/or refurbish Prince cylinders with genuine replacement
parts from Prince?
You are smart people…. You
know you can’t tell by looking what kind of materials the major components of
your cylinder are made from or the dimensions and tolerances for that matter.
The same goes for the seals that keep the oil where it
belongs. Prince Engineers make selections for the materials and
geometry based upon your valued input for the form, fit and function of the
products we made for you.
After market replacement
components made or supplied by someone else opens the door to unintended
consequences….. ones that you may not have even considered.
Trust Prince for your genuine
replacement parts…..
We designed them….
We manufactured them…
We stand behind them. “
Please visit http://www.princehyd.com/Catalog/Parts-Manuals for our product part lists.
Subscribe to:
Posts (Atom)