• Rigid chassis
  • WhichTractor size: Standard-size
  • No lab test on file
  • 1949–1957
  • 6,919 built

It was ranked on an engine power figure whose source does not say gross or net. WhichTractor size, not the maker’s category

BOLINDER-MUNKTELL BM-31 Transmission specs

10 transmission values on record for the BM-31.

Engine power, claimed · gross or net not stated

34 hp

25 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “Bolinder-Munktell BM 31”, claimed

This is the maker’s own figure, measured at the engine. Power at the PTO is lower — by how much, for this machine, nobody has measured.

How fast will a BM-31 go?

The fastest speed on record for a BM-31 is 18.6 mph (30 km/h). The gearbox itself is not on record yet.

Transmission — BM-31 Transmission
Drive2WD
Forward gears5
Reverse gears1
Transmission as described5 forward/1 reverse
Clutchpedal-operated dry single-disc clutch
Top speed forward18.6 mph · 30 km/h
Top speed reverse2.7 mph · 4.39 km/hhighest reverse speed printed in the article's speed tables
Service brakespedal-operated internal expanding brakes acting on rear wheels
Steeringmechanical steering
Front axlependulum-suspended, adjustable front axle

Source · Traktorenlexikon, “Bolinder-Munktell BM 31”

Sources and how this page was built

10 transmission values from Traktorenlexikon, “Bolinder-Munktell BM 31”.

Sources checked

14 SEP 2026

Spotted an error?

Sources

Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution

  1. Traktorenlexikon: Bolinder-Munktell BM 31 — CC BY-SA 4.0, WIKIBOOKS-TL-116152 · revision 994508. Wikibooks contributors (Traktorenlexikon). Original document