WORKSHOP MANUAL W26 Wärtsilä NSD Nederland B.V. Engine type W26
Chapter 1.3
Subject Starting air system
Issue date June '00
Trouble shooting guide for starting motor Problem/probable cause(s) 1. On pressing push-button, starter does not respond and no air flow seems to exist in control circuit. a) Empty air vessels b) Flow valve(s) closed. c) Control circuit blocked. 2. On pressing push-button, starter does not respond, although air flows through control circuit. a) Leaking control duct. b) Insufficient air pressure. c) Piston or valve (x18, x17 or x16) sticking in closed position. d) Push-button stuck. e) Excessive length of main air pipework. 3. Pinion revolves and advances, but does not engage the ring gear. a) Ring gear and/or pinion burrs or damaged. b) Lack of clearance between pinion and ring gear. 4. Pinion revolves and advances, but does not advance totally. a) Push-rod (11) inoperative.
b) Insufficient air pressure. c) Splined shaft (19) sticking. d) Excessive length of control pipe.
Suggested remedy
Charge air vessels Open flow valve(s). Disconnect and clean out.
Repair or replace. Increase pressure in air vessel. Remove and check both; smoothen guides or change parts. Remove and clean same Approach push-button to starter or install a solenoid valve near the latter.
Remove burrs or replace parts if necessary. Replace pinion by a more adequate one. Check for distortion of ring gear.
Disassemble, check, smoothen guide diameter; clean or replace if corrosion is visible. Increase pressure in air vessel. Disassemble, clean, check spring (22) and reassemble. Approach push-button to the starter or install a solenoid valve near the latter.
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