JA Purity IV JA Purity IV
JA Purity IV JA Purity IV
  • About The Site
  • Blue Book
  • Public Velo Stuff
  1. You are here:  
  2. Home
  3. Velocette Documents
  4. MOV and MAC
  5. F131-3R Instruction Book 1937
  6. The Oil Pump

It is very unlikely that the oil pump will need attention in normal service provided that the oil is changed at reasonably frequent intervals as recommended. If however it is necessary to remove the pump the crankcase should be warmed to expand the aluminium hous­ing in which the pump is fitted as the pump body is a very tight fit.

The four screws holding the plate at the bottom of the pump to the outside of the crankcase must be taken out, when the pump can be with­drawn. To dismantle the pump unscrew the small pump spindle gear which meshes with the worm gear on the crankshaft and which is screwed on to the pump spindle and is right-hand threaded. Take out the four screws holding the pump to the bottom plate when the cover can be removed and the gears taken out. Note : the oil pump has to be taken out before the intermediate gear can be taken off its spindle.

Previous article: Adjustment For Mesh Of Intermediate Gear Prev Next article: Carburreter Next
Open menu
  • Velocette Documents
    • GTP Manuals
      • F40/5R GTP Instruction Book 1951
    • KSS, KTS Manuals
      • F236/4R Mk. II OHC Instruction Book 1950
      • F42/3R OHC Models 1925-1931 Instruction Book
    • MAC Manuals
      • F469/4R MAC Service Guide 1965
      • F466/2R MAC Owner's Handbook 1955
      • F50/7R MAC Rigid Frame Service Manual 1955
      • F50/4R Supplement
    • MOV and MAC
      • F131-3R Instruction Book 1937
    • MSS Manuals
      • F477 Owners Handbook 1954
    • Venom, Viper, MSS
      • F485/1R Owner's Handbook 1956
      • F484/9R Service Guide 1967
      • F484/11R Service Guide 1971
    • Valiant Manuals
      • F62-1R Service Manual