Allis-Chalmers — Priming fuel system - standard duty filters
Maintenance
From a Allis-Chalmers operator's manual covering: 16000MKII, 17000MKII, 21000MKII, 25000MKII. Check it applies to your exact model before use.
Before you start
- Make certain hand primer pump plunger is locked before attempting to start engine.
Procedure
- If engine ran out of fuel, fill fuel tank.
- Loosen one of the plugs or vent screws in end of filter head.
- Unlock primer pump plunger by turning counterclockwise several turns.
- Move primer pump plunger up and down to fill filters with fuel and expel air.
- When fuel free of air bubbles appears at filter vent, tighten vent screw securely while continuing to operate primer.
- Continue operating primer to expel air from fuel gallery of injection pump.
- Check primer has solid feel; if spongy, check for air leak on suction side.
- Make certain hand primer pump plunger is at bottom of stroke and locked before starting engine.
Tools required
- Hand primer pump Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Solid feel indicates properly primed
Source: Allis-Chalmers operator's 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.