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Pullmaster M50 - User Manual

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PMC 323 070228
INSTRUCTION AND PARTS MANUAL
MODEL M50
FREE FALL
PLANETARY HYDRAULIC WINCH
THE LOGICAL CHOICE
PULLMASTER WINCH CORPORATION
8247-130th Street, Surrey, B.C. V3W 7X4, Canada
Telephone: 604-594-4444 Fax: 604-591-7332
Website: www.pullmaster.com
E-mail: sales@pullmaster.com
READ THIS MANUAL BEFORE INSTALLING, OPERATING OR
SERVICING THIS PRODUCT. THIS MANUAL CONTAINS IMPORTANT
INFORMATION. MAKE THIS MANUAL AVAILABLE TO ALL PERSONS
RESPONSIBLE FOR THE OPERATION, INSTALLATION, SERVICING
AND MAINTENANCE OF THIS PRODUCT.

Table of Contents

Questions and Answers

  • S
    Shane HarrisAug 11, 2025
    How to troubleshoot low line pull on Pullmaster M50?
    • A
      Ashley BrownAug 11, 2025
      If your Pullmaster Winches winch isn't producing the line pull at maximum pressure as listed in the specifications, here's what you should check: * Ensure the winch is mounted on a level surface. * Inspect cable sheaves or block purchases to ensure they turn freely. * Check the hydraulic motor for damage or wear. * Investigate and rectify any excessive back pressure in the hydraulic system. * Adjust the relief valve to the specified maximum operating pressure. * Verify that the clutch release valve is in the correct position.
  • J
    Joshua CooperAug 16, 2025
    What to do if my Pullmaster Winches winch will not reverse?
    • K
      Kyle AlexanderAug 16, 2025
      If your Pullmaster Winches winch is not reversing, it could be due to several reasons. First, check and replace any damaged O-ring seals on the brake piston, as leakage can prevent brake release. Next, inspect and replace damaged O-ring seals in the brake release channel. Ensure that the hydraulic pressure meets or exceeds the minimum operating pressure. Also, verify that the winch is mounted on a level surface. Lastly, clear any blockages in the brake release orifice in the brake housing.
  • N
    Nicole HoldenAug 20, 2025
    Why does the brake vibrate on my Pullmaster Winches when lowering a load?
    • J
      James MooreAug 20, 2025
      If the brake on your Pullmaster Winches vibrates when powering down a load, several factors could be responsible. Begin by ensuring that the pump is supplying sufficient flow and operating at normal RPM. Check the circulation flow of oil and rectify any issues, as the brake may be running too hot due to insufficient flow. Verify that the control valve has good metering characteristics. Inspect and replace any damaged brake plates or divider plates. Also, inspect and replace the damaged over-running clutch. Finally, check for and eliminate air mixed with hydraulic oil.
  • A
    Angelica KennedyAug 25, 2025
    Why is my Pullmaster M50 Winches winch not reaching specified line speed?
    • E
      Emily GilbertAug 25, 2025
      If your Pullmaster Winches winch isn't producing the line speed at maximum volume as listed in the specifications, consider the following: Check that the winch is mounted on a level surface. Inspect cable sheaves or block purchases to ensure they turn freely. Check the hydraulic motor for damage or wear. Investigate and rectify any excessive back pressure in the hydraulic circuit.
  • Z
    zrollinsAug 29, 2025
    Where are common oil leak points on Pullmaster M50?
    • K
      Kimberly GarciaAug 29, 2025
      If you're experiencing oil leaks in your Pullmaster Winches, there are a few common causes to investigate. If oil is leaking from the motor flange, inspect and replace the damaged O-ring seal on the motor flange. For leaks between cable drum flanges and housings, check pressure readings and inspect for restrictions or damages in the circulation lines. If oil is leaking out of the free fall housing, inspect and replace the damaged O-ring seal item 213.
  • J
    James MooreSep 1, 2025
    How to fix a stuck free fall clutch on Pullmaster M50?
    • J
      jesus05Sep 2, 2025
      To troubleshoot a free fall clutch that cannot be disengaged on your Pullmaster Winches, start by ensuring sufficient pressure or flow is supplied to the free fall release port. Inspect and replace any damaged O-ring seals in the clutch piston. Also, ensure that there is a sufficient load on the wire rope.
  • L
    Lee ChoiNov 6, 2025
    Why won't my Pullmaster M50 brake hold?
    • C
      Christopher NavarroNov 6, 2025
      If your Pullmaster Winches brake will not hold, several factors could be at play. Start by checking for damaged brake plates or divider plates due to contamination in the hydraulic fluid or insufficient circulation. Also, verify that the brake piston isn't seized due to hydraulic fluid contamination. Excessive back pressure in the return line could also cause the brake to release. Ensure the control valve has the correct spool, allowing pressure ports to open to the reservoir in neutral. Confirm the correct control valve is in use, with the free fall release port open when not activated. Check that the wire rope is properly fastened, and inspect the sprag clutch for damage or wear. Finally, for winches with an external brake release, ensure the plumbing is correctly configured to vent to t...

Pullmaster M50 Specifications

General IconGeneral
ModelM50
TypeHydraulic Winch
Line Pull50, 000 lbs
Operating Pressure2, 500 psi
Hydraulic Pressure2, 500 psi
Rope Size3/8" (9.5 mm)

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