TM 5-3805-262-342-4. ENGINE TROUBLESHOOTING (CONT)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION13. DIFFERENCE BETWEEN TWO OR MORE CYLINDER COMPRESSION VALUES MORE THAN 25 PSIGWHEN PERFORMING CYLINDER COMPRESSION TEST (PAGE 3-12).Step 1.Remove muffler (refer to TM 5-3805-262-20).Repeat engine compression check (page 3-12).a. If compression check readings are normal, problem was restrictedmuffler. Replace muffler (refer to TM 5-3805-262-20).b. If compression check readings are still high, go to step 2 be-low.Step 2. Remove cylinder heads (page 3-45).Check for carbon deposits on cylinder head and piston crown.a. If carbon deposits are present, remove from cylinder head andvalve heads using power driven wire brush.Dry cleaning solvent P-D-680 used to clean parts is toxic and flammable.Wear protective goggles and gloves and use only in a well ventilatedarea. Avoid contact with skin, eyes and clothes and donut breathevapors.Do not use near open flame or excessive heat and don-t smokewhen using it. Failure to do so could cause serious injury. If you be-come dizzy while using cleaning solvent, get fresh air and medicalattention immediately. If contact with skin or clothes is made, flushwith large amounts of water.If contact with eyes is made, wash eyeswith water and get medical aid immediately.Remove residue using cleaning solvent P-D-680 and clean cloths.Compressed air used for cleaning purpose will not exceed 30 psi. Useonly with effective chip guarding and personal protective equipment(goggles/shield, gloves, etc). Failure to do so could cause seriousinjury to eyes and possible blindness.If you hurt your eyes or if aforeign object is blown into your eyes, seek medical attentionimmediately .Remove carbon from piston crown in same manner as above. Usecompressed air to remove residue from cylinders.2-44
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business