Magnum Venus Plastech VPH-2500 User Manual

P o werslide Po werhead

2.50” Diameter

MPH-2500 & VPH-2500

MAGNUM VENUS PRODUCTS

Assembly Manual

Rev. 08-07-02

Powerslide Powerhead

Powerslide Powerhead

Assembly Manual

Corporate Headquarters/Manufacturing
5148 113th Ave., Clearwater, FL 33760 USA
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Web: www.magind.com

©2002 Magnum Venus Products Manual Part No: XXXXX-X

Powerslide Powerhead

Manufacturing/Sales
1862 Ives Avenue, Kent, WA 98032 USA
Phone: [phone] US/Canada
Fax: [phone]
Email: [e-mail]
Web: www.venusmagnum.com

Table of Content s

Powerslide Powerhead

Assembly Manual

CHAPTER 1 - INTRODUCTION

CHAPTER 2 - VALVE BLOCK DISASSEMBLY

CHAPTER 3 - VALVE BLOCK REASSEMBLY

CHAPTER 4 - AIR CYLINDER DISASSEMBLY

CHAPTER 5 - PILOT VALVE REBUILD

CHAPTER 6 - AIR CYLINDER REASSEMBLY

CHAPTER 7 - PARTS DRAWINGS

Powerslide Powerhead

Chapter

1

Powerslide Powerhead

Introduction

This manual covers both the 4” and 5-5/8” stroke length air motors. When there is a
part difference between the two air motors the 4” stroke is referred by VPH and the 5­5/8” air motor will be referred by MPH. The reassembly will require the use of removable
Lock Tite® and Lithium grease.

NOTE
Before starting any service work, release fluid and air pressure from
system. Remove the two air lines from the air motor. The air motor
assembly does not have to be completely removed from the system for
service work.

Please read the manual carefully. Follow the steps in the order given, otherwise you
may damage the equipment or injure yourself.

During Disassembly . . .

As you disassemble the equipment, lay out the components in the correct order and
direction, and have all component drawings available to refer to prior to disassembly.
This will help you to reassemble them.

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Chapter

2

Powerslide Powerhead

Valve Block Disassembly

1. Remove the two hex head screws (F-HB-04C-56-SS) from the front of the
muffler (VPH-4253-01 or MPH-2505-01) and remove the muffler.

2. Remove the four socket head cap screws (F-CS-04C-32-SS) from the valve
block.

3. Unscrew the poly fitting nut from the male elbow (MPH-2539) located on the
side of the valve block. Remove the two end caps (MPH-2521) from the valve
block.

4. Remove the pipe plug (PF-AP-04-SS) from the lower valve block (MPH-2516).
Use a flat head screwdriver on ether of the two valve pistons (MPH-2517) and
rotate until the hole in the valve poppet (MPH-2520) aligns with the pipe plug
port in the lower valve block.

5. Insert a 7/32” hex wrench through the pipe plug port and into the hole in the
valve poppet (MPH-2520). (See Figure 1)

Figure 1

Use a flat head screwdriver in the slot
on the top of the valve piston and rotate
to align the round hole in the poppet
with the tapped hole in the block. Insert
hex wrench into the poppet and
unscrew the valve piston from the valve
rod. Repeat process for second valve
piston.

Powerslide Powerhead

NOTE

The hole diameter in the valve poppet is .2685 (6.81mm) if a 7/32” hex
wrench is not available.

Unscrew ether of the two valve pistons (MPH-2517) and remove. Repeat
removal of the second valve pistons.

6. Remove the button head cap screw (F-BHCS-04C-08-SS) from the front of the
lower valve block (MPH-2516). Twist and pull the upper valve block (VPH-4257
or MPH-2515) from the lower valve block (MPH-2516). Remove the valve rod
assembly from the valve block.

7. Remove the two cap screws (F-CS-1024-06-SS) from each of the two valve
exhausts (MPH-2522). Pull both of the valve exhausts from the valve blocks.
Remove the diaphram (MPH-2529) from the lower valve block (MPH-2516).

(See Figure 2)

Figure 2

Lift the inner edge of the
diaphram up and remove
from block. Coat the
diaphram bore with lithium
grease.

Avoid putting any scratches in the valve blocks. To remove the diaphram
use a small screwdriver and push the center riser on the diaphram to one
side and slide out.

Repeat the removal of the diaphram from the upper valve block (VPH-4257 or
MPH-2515).

8. Remove each O-ring and replace with new. Coat every new O-ring with lithium
grease. Coat the diaphram bore and both valve piston bores with lithium grease
before assembling. Use a wire brush to clean the valve rod threads of any dry
Lock Tite®.

Powerslide Powerhead

NOTE

Chapter

3

Powerslide Powerhead

Valve Block Reassembly

NOTE

Removable Lock Tite will be required for reassemble. If ether one of the
two valve rods unscrewed from the valve poppet (MPH-2520) during
disassembly, put one to two drops of removable Lock Tite on threads and
assemble.

1. Set the valve rod assembly into the lower valve block (MPH-2516).

NOTE

The MPH-2500 has a long and short valve rod, insert the short valve rod
(MPH-2519) into the lower valve block. Rotate the valve rod so the hole in
the valve poppet aligns with the pipe plug (PF-AP-04-SS) bore. Insert 7/32”
hex wrench through the pipe plug bore and into the hole in the valve
poppet to hold valve rod assembly in place.

2. Slide the upper valve block (MPH-2515 or VPH-4257) into the lower valve block
(MPH-2516) and align properly. Screw the button head cap screw (F-BHCS­04C-08-SS) into the lower valve block.

3. Use one to two drops of removable Lock Tite® in the female threads of the valve
pistons (MPH-2517). (See Figure 3) Shake off any excess Lock Tite® and
screw onto ether valve rod end. Repeat for process for the second valve piston
and remove hex wrench from valve block. Push in on the valve piston from
ether end to position the valve assembly. Use ether Teflon tape or pipe com­pound on the pipe plug (PF-AP-04-SS) threads and screw into the lower valve
block.

Powerslide Powerhead

Figure 3

Use only one to two drops of Lock Tite
in valve piston threads.

®

4. Insert the diaphrams (MPH-2529) into the upper and lower valve blocks with the
outside leading edge of the diaphrams facing out. Push the diaphrams all the
way down into the valve block bore. Install the valve exhausts (MPH-2522) onto
the upper and lower valve blocks. One side of the valve exhausts has three
holes, one of the holes must line up with the machined holes in the upper and
lower valve block. (See Figure 4) Install the two socket head cap screws (F­CS-1024-06-SS) into each of the two valve exhausts and snug tight.

5. Install valve end caps (MPH-2521) into the upper and lower valve blocks and
lightly snug tight.

Do not block
hole

Powerslide Powerhead

Figure 4

Do not block the hole in the
valve block when installing the
valve exhaust.

Chapter

4

Powerslide Powerhead

Air Cylinder Disassembly

1. Remove the E-ring (APP-9102) from the piston rod (VPH-2502 or MPH-2503).
Lift the sleeve (APP-9109) up and remove the two connectors (APP-9096).

2. Remove the three hex nuts (F-HN-05F) from the tie rods (MPH-2524 or VPH-

4258). Pull the upper end cap (MPH-2508) off the cylinder (VPH-2501 or MPH-

2502).

3. Slide the piston rod (MPH-2503 or VPH-2502) up from the lower end cap (MPH-

2507).

4. Replace all O-rings and coat with lithium grease. Coat the inside of the cylinder,
piston rod and piston rod bushing with lithium grease.

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Chapter

5

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Pilot Valve Rebuild

The two pilot valves in the upper and lower end caps are the same. Start
with the pilot valve in the upper end cap.

NOTE

1. Remove the inlet spring housing (MPH-2509) from the upper end cap (MPH-

2508). Remove spring (MPH-2533) with inlet rod (MPH-2514). Turn the end
cap over and a small spring (MPH-2526) will fall out. (See Figure 5) Replace
O-ring (O-B-012) on the spring housing (MPH-2509) and the O-ring (O-B-006)
on the inlet rod (MPH-2514). Coat O-rings and springs with lithium grease. Set
spring (MPH-2533) into the spring housing (MPH-2509) with inlet rod (MPH-

2514) facing up.

MPH-2526 Spring

Figure 5

The MPH-2526 spring
will be installed from the
bottom of the end cap.

Powerslide Powerhead

NOTE

Do not install the small spring (MPH-2526) at this time. Screw the inlet
spring housing (MPH-2509) into the upper end cap.

2. Remove the stem seal (MPH-2511-01) from the bottom of the upper end cap
(MPH-2508). Remove the seal guide (MPH-2512) with the spring (MPH-2528).
Replace O-ring (O-B-012) and coat O-ring and stem with lithium grease. Drop
the small spring (MPH-2526) into the stem seal bore, the spring should center
itself onto the end of the inlet rod (MPH-2514). (See Figure 6)

Figure 6

Install the MPH-2526 after the spring housing (MPH-2509), spring
(MPH-2533) and inlet rod (MPH-2514) has been installed in the top
of the end cap.

3. Insert the spring (MPH-2528) with the seal guide (MPH-2512) into the end cap.

Set the small end of the seal guide (MPH-2512) onto the spring (MPH-2528)
Set a new O-ring (O-B-008) on top of the seal guide. Screw the stem seal
(MPH-2511-01) with valve stem (MPH-2513) into the upper end cap.

(See Figure 7)

4. Repeat the pilot valve rebuild on the lower end cap.

MPH-2513

Valve Stem

O-B-012

O-Ring

O-B-008

O-Ring

MPH-2512

Seal Guide

MPH-2511-01
Stem Seal Assy

MPH-2528

Spring

Figure 7

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Chapter

6

Powerslide Powerhead

Air Cylinder Reassembly

1. Insert the piston rod (VPH-2502 or MPH-2503) through the piston rod bushing
(MPH-2506). Slide the cylinder (MPH-2502 or VPH-2501) over the piston (MPH-

2501) down onto the lower end cap o-ring (O-B-144).

2. Set the upper end cap (MPH-2508) onto the cylinder with the valve block flats
facing the same direction. Screw the hex nuts (F-HN-05F) onto the tie rods and
snug the hex nuts.

3. Install the connectors (APP-9096), sleeve (APP-9109) and e-ring (APP-9102) onto
the piston shaft.

4. Connect the pilot air hose and regulated air hose to air motor.

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Chapter

Powerslide Powerhead

Parts Drawings

7

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Powerslide Powerhead

Powerslide Powerhead

Corporate Headquarters/Manufacturing
5148 113th Ave., Clearwater, FL 33760 USA
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Web: www.magind.com

©2002 Magnum Venus Products Manual Part No: XXXXX-X

Powerslide Powerhead

Manufacturing/Sales
1862 Ives Avenue, Kent, WA 98032 USA
Phone: [phone] US/
Canada
Fax: [phone]
Email: [e-mail]
Web: www.venusmagnum.com