modul ini akan membantu anda dalam melakukan perbaikan alat berat komatsu. ada akan diajarkan langkah langkah trouble shooting dan cara- cara perbaikannya sesuai dengan standard komatsuDeskripsi lengkap
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After observing many critical troubles in some system or the other over the period of time in various units & systems, it had occurred to me that most of the time we are not having any exact method...Full description
Trouble Shooting GuideFull description
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fault code jcb
modul ini akan membantu anda dalam melakukan perbaikan alat berat komatsu. ada akan diajarkan langkah langkah trouble shooting dan cara- cara perbaikannya sesuai dengan standard komatsuFull description
Briggs and Stratton Factory Service Manual
Machinery Analysis
Briggs and Stratton Factory Service ManualFull description
#1 b e ari ng s up po rt a nd adapter out of round.
FIX Switch bleed valve or swap to other side. R e pl ace s up po rt an d a da pt er a ss y.
BLEED VALVE SYMPTOM Very high T5. Surging Compressor . Rumbling Compressor. Hot start, hung start, choking/stall.
CAUSE
FIX
Open bleed valve or late closure of BOV. Bleed Valve closing early.
Clean mettering orifice, change diaphragm, or switch bleed valve. Clean the C-D orifice Switch bleed valve. Fluttering bleed valve . Switch bleed valve BOV on wrong side of engine. Swap BOV to other side.
T5 SYSTEM SYMPTOM Erratic T5 reading. High T5
CAUSE
FIX
Loose trim stick terminals. Corrode d trim re sistor connection. Several burnt thermocouples or corroded trim probes lead.
Repair te rminal block. Cle an conne ction.
T5 Difference betwe en
Engine with different
Check T5 gauges* by switching from
both engine.
temperature profiles.
side-to-side , verify trim stick by
Low T5
Replace trim stick Replace thermocouples
comparing log book trim value to that on stick. If OK, no further action N o re ad in g a ft er re p ai r.
required. Th e rm o co up le s l o ck w ire d t o R em o ve l ock w ire an d co rre ct. ground.
TORQUE SYSTEM SYMPTOM High torque reading T/ M re ad in g l e ve l s o ff bu t actual torque still increasing Dropping torque pressure
CAUSE Stuck T/M control valve (return spring or sleeve valve) Le ak ag e f ro m th e af t s e al in g ring Worn T/M Seal
Fl uctu ati ng oi l p re ss ure o r undersize T/M valve
FIX Apply Nitrogen to T/M oil pressure port to engine & rock prop. Shaft R ep la ce T/ M s ea li ng ri ng . Check for potential overtorque. Increase oil pressure (within limits). If pressure continues to drop, replace seal. R ep lace pre ss ure re gu la ti ng val ve or replace T/M valve
SECONDA RY AIR SYSTEM & BREATHER SYMPTOM
CAUSE
Oil in compressor (or at ble ed valve) O il sm el l i n the cabin
Oversized #1 bearing labyrinth seal O ve rs ize d #2 b eari ng re ar labyrinth seal Sm ok e at start up and /or O ve rs ize d #2 b eari ng f ron t shutdown. Burnt oil on turbine labyrinth seal Black exhaust smoke during Oversized #3 bearing operation. labyrinth seal. O il m ist i n ov erb oard Bro ke n carb on se al breathing. Erratic oil pressure at altitude. Low static pressure in oil tank.
FIX Replace labyrinth seal Re pl ace l aby ri nth se al Re pl ace laby ri nth se al Replace labyrinth seal. Re pl ace starte r-ge ne rato r carb on seal Check for proper operation of the tank pressurizing valve. Change O-ring on oil filter housing.
OIL SYSTEM SYMPTOM O il le aking at com pre ssor inlet or #1 bearing.
CAUSE Che ck valve stuck ope n.
Clogged or damage oil filter element, broken check valve spring, or scored pressure relief valve. Increase in oil temperature. Stuck check valve causing b yp as si ng of oi l pa st th e relief valve. O i l l e ak in g o ut of b le e d v al ve . S ta ti c l e ak f ro m oi l tan k. Low oil pressure. Blocked oil filter. High fluctuation of oil pressure High tank air pressure at high altitude. differential. O il s me ll i n th e cab in . Ex ce ss iv e o il cro ss in g th e #1 labyrinth se al. Oil smell in the cabin and Excessive oil crossing the oily diffuser pipes. #2 rear labyrinth seal. 24 psi decrease in oil pressure. Oil filter is bypass due to backwards oil filter. High oil te mpe rature Dive rte r valve not dive rting oil to oil cooler Oil pressure increase with Ng Cracked main oil pressure speed. pump housing. High oil consumpti on. Oil le aking from oil-to -fue l heater, mixing with fuel and burning.
FIX Re move the housing and cle an. Le t sit for 10 minutes. If oil present, repair or replace check valve . If oil not prese nt, check and replace the filter housing O-ring, the center tube O-ring, or the pressure pump drive shaft diaphragm seal.
Fluctuating oil pressure.
Check the oil filter element, check valve, and pressure relief valve.