Continental Hydraulics VSD08M User manual

Form No. 264587 8/03
1
CAUTION – Before performing any service
operation on any Directional Control Valve,
be sure that all pressure has been relieved
from BOTH SIDES of the system.
CAUTION – Before performing any service
operation on any Directional Control Valve,
disconnect or lock off power supply.
CAUTION – Before manually actuating any
Directional Control Valve, be sure that any
resulting machine function will not endanger
persons or equipment.
PRODUCT IDENTIFICATION
Each Directional Control Valve has an Ordering
Code printed on its cover label. See Figure 1 for the
location of the Ordering Code.
This Service Booklet applies to products with
Ordering Codes like the sample in Figure 2.
GENERAL SPECIFICATIONS
RECOMMENDED FLUID
Petroleum, water-based fluids (not more than 40%
water) and most phosphate esters. Other fluids may
be acceptable, but special O-rings may be required.
Viton seals are standard.
FLUID TEMPERATURE RANGE
Fluid temperature up to 200° F. (93° C.) will not
appreciably affect valve performance. However, for
safety reasons, temperatures above 130° F. (54° C.)
are not recommended.
RECOMMENDED OPERATING VISCOSITY
80 to 350 SUS (16 to 75 CS).
FILTRATION
ISO 18/16/13 or better.
MOUNTING POSITION
Any unrestricted position acceptable. Horizontal
mounting preferred.
NFPA FLOW PATH/ACTUATING PATTERN
SOLENOID, AIR AND OIL ACTUATED:
Actuating operator a – connects flow to cylinder
port A.
Actuating operator b – connects flow to cylinder
port B.
GENERAL INFORMATION
SOLENOID ACTUATED – Spring centered and
spring offset valve types will be spring positioned
unless actuated continuously. Detented, no-spring
valves may be actuated momentarily. When
solenoid is not actuated, the spool will remain in last
position attained, provided there is no severe shock,
vibration or pressure surge.
Pressure surges in a common tank line serving
these and other valves can be great enough to
cause inadvertent valve shifting. This is particularly
critical in the no-spring, detented type valves.
Separate tank lines may be necessary.
NOTE: Any sliding spool valve held shifted under
pressure for long periods may stick and not spring
return due to fluid residue formation. To prevent
sticking, valves should be cycled periodically.
PREVENTIVE MAINTENANCE
After Directional Control Valves have been put in
operation, provide periodic inspection and
maintenance. The check points listed below will
assist you in extending the life of your Continental
valves.
Fluid Operating Temperature – Fluid temperature
at the reservoir during operation should be kept
between 100° F. and 130° F. (37° C. and 54° C.).
SERVICE MANUAL
VSD08M Solenoid Actuated, Pilot Operated
Directional Control Valves
Basic Valve
Function
Spool Type
Seal Type
Mechanical Options
Pilot and Drain Location
Electrical Options
Solenoid Type
Solenoid Manufacturer
Design Letter
“A” Design Series
VSD08M - _ _ - G _ _ _ - _ _ _ - _
Figure 2
Ordering
Code
Figure 1

Form No. 264587 8/03
2
Fluid Cleanliness – Control particle contamination
by changing or cleaning all filter elements
periodically BEFORE they become clogged and start
to by-pass.
Electrical Inspection – Periodically check to assure
proper voltage, and that all electrical connections are
making good contact.
After Extended Shutdowns – Some types of
hydraulic fluids become tacky after long periods of
non-use. Manually actuate valves several times
after extended shutdowns to assure that all
components move freely before powering up.
CAUTION – Before manually actuating any
Directional Control Valve, be sure that any
resulting machine function will not endanger
persons or equipment.
VSD08M VALVE REPAIR PROCEDURES
DISASSEMBLY and REASSEMBLY
GENERAL
Disassembly and reassembly of Directional Control
Valves is a delicate operation. Anyone attempting it
must assume responsibility for the operation of the
valve. Continental valves may be returned to the
factory or to an Authorized Repair Center for repair.
Contact your local Distributor or Continental
Hydraulics for details.
If interchanging spool types or making other
conversions, remark the escutcheon plate to show
the correct code. Include stops, spool, spring, and
detent orientation. See Figure 2 to serve as a guide
to correct numbering.
Disassembly in the field by other than an Authorized
Repair Center technician, whether for repair or
modification may void warranty.
Before disassembly, study the exploded view on
Page 3 and note the orientation and location of all
parts. Special care should be taken to avoid
damage to the spool and/or body bore. Even a
microscopic nick in a land on the spool or body may
ruin the valve.
All valves can be disassembled and reassembled in
a horizontal-mounted position, provided there is
adequate space and the work area is clean.
Place the spool in a bath of clean oil to coat it with a
protective film, and ease assembly. Inspect o-rings
for nicks, and make sure they are well oiled. It’s a
good idea to replace all seals whenever the valve is
disassembled.
Continental valves are precisely machined to
exacting tolerances. Do not force any parts, or
overtighten threaded fasteners.
PART AND ASSEMBLY IDENTIFICATION
The parts drawing and parts list on Page 3 may be
used to identify individual parts and assemblies in
directional control valves.
VSD08M PILOT AND DRAIN
Continental pilot operated valves are ordered from
the factory with either internal or external drains.
Converting the pilot or drain to either internal or
external mode may be done as follows:
When internal pilot and/or drain is used, the
corresponding “X” and “Y” ports in the subplate must
be plugged. The pilot pressure, whether internal or
external, must be at least 70 psi (5 bar) greater than
the pressure at the tank (“T”) line. It may be
desirable to use external pilot when system pressure
is subject to wide fluctuations. External drain must
be used when either an “open” center or “tandem’
center spool is used. External drain is also
recommended when using pilot chokes. Pilot
chokes do cause some pressure variations in the
tank line that will affect spool movement if internal
drain is used.
MAXIMUM A, B, P Ports 5000 psi 345 bar
OPERATING T, & Y Ports 3000 psi 207 bar
PRESSURES
MINIMUM OIL PILOT PRESSURE 70 psi 4.8 bar
MAXIMUM CYCLE RATE up to 300 cpm
NFPA MOUNTING SURFACE ANSI/B93.7-1986 - D08
ISO 4401 - SIZE 08
WEIGHT Single Actuator 33 lbs. 15 kg
Double Actuator 34 lbs. 15.4 kg
PERFORMANCE SPECIFICATIONS
SECTION A-A
SECTION B-B
CODE LOCATION PILOT DRAIN
ABC
1INTERNAL PILOT RBB
EXTERNAL DRAIN
2EXTERNAL PILOT BRB
EXTERNAL DRAIN
3INTERNAL PILOT RBO
INTERNAL DRAIN
4EXTERNAL PILOT BRO
INTERNAL DRAIN
B = Blocked 1/16 NPT Pipe Plug (Item #30)
R = Restricted 1/16 NPT Pipe Plug with 0.070 Orifice (Item #33)
O = Open No Plug

ITEM CODE PART # DESCRIPTION QTY
NO. NO. REQ’D
11 VSD08M-1A-GR- XX - XX 1
12 VSD08M-2A-GR- XX - XX 1
13 VSD08M-3F-GR- XX - XX 1
15 VSD08M-5F-GR- XX - XX 1
570C 166069 O-Ring 1
670C 350055 Check Valve Sub-Ass’y. 1
770C 350012 Poppet Seat 1
8198225 Cap Screw #10-24 x 1 4
8KK199658 Cap Screw #10-24 x 2-1/2 4
912144 Lockwasher 4
11 552404 Valve Body 1
12 409882 A Spool 1
12 409883 A2 Spool 1
12 450053 A3 Spool 1
12 552044 AC Spool 1
12 552047 A1C Spool 1
12 552048 A2C Spool 1
12 552043 A40C Spool 1
12 409884 B Spool 1
12 450295 B2 Spool 1
12 409885 F Spool 1
12 409886 F1 Spool 1
12 409887 F2 Spool 1
12 450136 F3 Spool 1
12 552051 FC Spool 1
12 552046 F1C Spool 1
12 552045 F2C Spool 1
12 3, 5 409888 G Spool 1
12 409890 K-E Spool 1
12 3, 5 350757 L Spool 1
13 351397 End Cap as req’d
14 1 Only 164635 Spring 1
15 3, 5 164636 Spring 2
16 3, 5 167816 Spring Retainer 2
16 3, 5 253262 Spring Retainer 2
w/A*C,F*C Spools
17 1 Only 167817 Spring Retainer 1
18 3, 5 254762 Washer 2
w/L Spool Only
21 254389 O-Ring Boss Plug 5
22 164677 O-Ring 2
23 1 Only 260109 Spring Retainer 1
w/A*C, F*C Spools
24 109413 O-Ring 2
25 109414 O-Ring 4
26 4269 Roll Pin 2
30 11794 Pipe Plug A.R.
33 140047 Pipe Plug w/Orifice A.R.
35 108295 O-Ring 4
36 B** 552464 Elec. Box Cover 1
37* Din Coil 262390 Label 1
37* B** 264280M Label 1
38 B** 351428 Cover Gasket 1
38 WD 351544 Cover Gasket 1
39 B** 262349 Cover Screw 4
68* 259079 Escutcheon Blank 1
69 250597 Escutcheon Screw 2
80 250141 Bolt Kit 1
Not Shown:
34 JJ, JA, JB 262333 Stroke Adj. Ass’y. (Option) as req’d
40 KK 262423 F03MSV Valve 1
71 Code 2 261749 Spool Stop 2
w/A1C, F1C Spools
* Specify Model Code When Ordering.
3
Form No. 264587 8/03
VSD08M PARTS DRAWING
VSD08M PARTS LIST

4
Continental Hydraulics
12520 Quentin Avenue South
Savage, MN 55378 U.S.A.
Phone: [phone] Fax: [phone]
Because Continental Hydraulics is continually improving its products, specifications and appearance
are subject to change without notice.
Form No. 264587 8/03 © 2003 Continental Hydraulics Printed in U.S.A.
PROBLEM POSSIBLE SOLUTION
Erratic or binding valve spools Drain and flush the system. Disassemble valve and check spool and plug
assemblies for burrs or other damage. Replace parts as necessary.
New valve does not function. Improper installation. See page 1 for valve flow path/actuating patterns.
Check electric connections and circuit breakers.
Confirm that hydraulic fluid type and viscosity meet specifications given on
page 1.
Overhauled valve does not function. Improper reassembly or reinstallation. See page 2 for reassembly
information. See page 1 for valve flow path/actuating patterns.
Confirm that hydraulic fluid type and viscosity meet specifications given
on page 1.
Valve leakage Check for leaking seals. Replace as needed.
Repeated solenoid burnout Check voltage to determine that is is within ±10% of rating. See chart above.
Check that opposing solenoids are not being energized simultaneously.
Detent spool does not shift properly. Check that solenoid is energized long enough to ensure complete shift.
See above for typical response time.
Cylinder controlled by valve won’t Confirm that there is no internal leakage in the cylinder, and that there
hold its load. are no fluid leaks in the power system. If no other sources of leakage are
found, disassemble valve and check for wear or scoring on body bore and
spool. Replace defective parts.
TROUBLESHOOTING GUIDE
D08 MOUNTING SURFACE DIMENSIONS
NOTES: A=Cylinder Port T = Tank Port
B = Cylinder Port X = Pilot Port
P=Pressure Port Y = Drain Port
Mounting surfaces must be flat within 0.1 mm per 100 mm
(.0004 in. per 4.00 in.) and N8 63AA finish.
Inch mm Inch mm Inch mm
A6.00 154.0 J0.44 11.1 R4.57 116.0
B5.13 130.2 K0.69 17.5 S1/2-13 UNC
C4.44 112.7 L0.19 4.8 T0.44 11.2
D3.97 100.8 M0.69 17.5 U0.28 7.5
E3.719 94.5 N0.75 19.0 V0.38 9.7
F3.03 77.0 O2.87 73.0 W0.92 23.4
G2.09 53.2 P2.93 74.6
H1.16 29.4 Q3.63 92.1
INRUSH
SOLENOID VOLTAGE & VOLTAGE CURRENT HOLDING HOLDING
CODE FREQUENCY LIMITS (AMPS) CURRENT POWER
LD.WIRE - DIN VOLTS - Hz. MIN. - MAX. MAX. (AMP) (WATTS)
33L - 60L 120 - 60 108 - 126 2.10 .49 24
110 - 50 99 - 116 .58 26
34L - 61L 240 - 60 216 - 252 1.10 .24 24
220 - 50 198 - 231 .29 26
- 68L 120 - 60 108 - 132 1.10 .19 10
110 - 50 99 - 121 .21 10
42L - 70L 24 DC 21 - 26 1.00 1.00 24
44L - 75L 12 DC 10 - 13 2.00 2.00 24
TYPICAL ELECTRICAL AND RESPONSE TIME