Kubota — Glow Plug Testing
Testing & diagnosis · Glow Plugs
From a Kubota service manual covering: Hurth HBW 100, Hurth HBW 125, Hurth HBW 150, Hurth HBW 250, Hurth HBW 35, Hurth HBW 50, M-25XPB, M-35B, M-40B. Check it applies to your exact model before use.
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Before you start
- Glow plugs become very hot; do not burn fingers.
- Do not keep a glow plug on for more than 30 seconds.
Procedure
- Disconnect leads from glow plugs.
- Measure resistance with ohmmeter across glow plug terminal and body.
- If 0 ohm indicated, screw at tip and body are short-circuited.
- If standard value not indicated, replace glow plug.
Tools required
- ohmmeter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Standard resistance: approx. 0.9 to 1.2 ohm
- Power drain: 8 - 9 amps per plug
Source: Kubota service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.