Remington Diesel 6126 Series User manual

Ⅰ
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Operation Manual
Engine Series 6126
(6126AZLD-4/6/7/8)
Remington Diesel Engines Manufacture

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Content
Chapter 1 Description…………………………………………………………1
Chapter 2 Diesel Engine Operation and Attention.……………………………2
Chapter 3 Diesel Engine Safety Operation Specification……...………………4
Chapter 4 Diesel Engine Main Technique Performance…………….…………5
Main Technical Specifications…………………………………………5
Technical Data………………………….………………………………6
Fit Clearances and Wear Limit of Main Parts ………………………………8
Chapter 5 Operation of the Marine Diesel Engine…………………………… 9
Transportation………………………………………………………… 9
Installation………………………………………………………………9
Storage and preservation ……………………………………………11
Fuel, oil and jacket water ……………………………………………12
Prepare for starting……………………………………………………13
Starting ………………………………………………………………14
Running…………………………………………………………………15
Stopping ………………………………………………………………16
Run in Operation rule for the new diesel engine ……………………………17

Ⅱ
Chapter 6 Technical Maintenance of diesel engine………………………18
Working day maintenance ………………………………………18
First grade technique mainenance….………………………………18
Second grade technique mainenance………………………………19
Third grade technique mainenance ………………………………20
Chapter 7 Trouble and Remedy Method…………………………………21
Start failure……………………………………………………21
Inefficiency power ……………………………………………22
Abnormal exhaust smoke…………………………………………23
Unusual pounding noise……………………………………………24
Oil pressure drop to zero or lacking pressure………………………25
Engine Overheated Engine Overheated……………………………26
Engine Overspeed…………………………………………………26

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Chapter 1 Description
6126 series diesel engine for our company in introducing, digesting, absorbing the
domestic and foreign advanced technology foundation, develop the successful high power
series diesel engine. This machine has the characteristics of compact structure, high
reliability, advanced technology index, good startup performance, simple operation,
convenient maintenance and excellent economic performance.
6126 series diesel engine can be widely used in heavy truck, loader, bulldozer,
excavator, crane and other engineering machinery and small power station. To maximize the
use of different users.

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Chapter 2 Diesel Engine Operation and Attention
The diesel engine be tested by the test rule before leave the factory, accelerator and
govenor be sealed by lead.
1- Do not use the bad quality or unclear fuel and oil.
2- Use the soft fresh water to cool the diesel engine, must not cooled by sea water
directly.
3- It’s forbidden to work at intake system leak and without air cleaner.
4- It’s forbidden to work and start at less oil and water.
5- It’s forbidden to work at long time overload and such against work regulation.
6- It’s forbidden to test the generator by short circuit method.
7- Control the starting time and spacing at electric starting.
8- Technique maintenance at fixed period.
9- Drain out the cooling water to prevent the cylinder frost cracking at the ambient
temperature lower zero℃.
10-Inject hot water and oil at the ambient temperature lower than -5℃.
11- Do some test run as this description before using the new engine.
12-Do not speed up suddenly and running with load after the engine start without load.
13-Identify the safety mark at engine operation.
Pay attention the above items.

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Chapter 3 Diesel Engine Safety Operation Specification
1- The operator should read the Maintenance Manual and know well about the structure,
operation and maintenance.
2- One who is not familiar with the operation instructions is not allowed to operate the
engine.
3- The engine is not permitted to be started unless all preparation work for the engine
starting has been done.
4- Attention to the fire protection at the engine running, the fuel tank should be provide
a fire prevention device.
5- While the engine is operating, it is not permitted to be dismantled, checked and
adjusted.
6- Emergency stop the engine at oil pressure lower even falls to zero, or with abnormal
sound inside while engine running.
7- Once the engine overspeeds suddenly due to out of control, push the stop lever
immediately to stop the engine, then check the cause and remedy the fault. If the stop
lever is out of order, push down the decompression lever or block up the air inlet port
to stop the engine.
8- The circuit system should be overhauled by the professional electrician or one knows
well electricity knowledge.
9- The engine should be used in ventilation area to prevent the waste gas pollute the
working environment.

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Chapter 4 Diesel Engine Main Technique Performance
Engine Main technique specification
Model
6126ZLD4
6126ZLD7
6126ZLD8
Type
In line, water cooling, 4 stroke, wet cylinder, direct injecting
combustion chamber, electrical starting
Intake
Turbocharged inter-cooled
Turbocharger air cooled system
Pulse type
Lubricate type
pressure, splash combined type
Cooling type
Water cooled
Crankshaft rotation direction
inverse (face to the flywheel)
Cylinder no.
6
Bore × Stroke mm
126×130
126×155
Displacement L
9.726
11.596
Pressure ratio
16 : 1
Firing order
1 –5 –3 –6 –2 –4
Rated output kW
250
308
345
Rated speed r/min
1800
1800
1800
Prime output kW
260
320
350
Highest speed r/min
1800
1800
1800
Average effective pressure kPa
1834
2056
2125
Fuel consumption rate g/kW.h
turbocharged and after cooled：≤210.0
Oil consumption rate g/kW.h
≤1.68（after run in）
Lowest load stable speed r/min
/
Lowest idling stable speed r/min
600 ±50
Net mass kg
850~900
Dimensions (L × W × H) mm
1640×740×1120

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Technique Data
1. Each kind of temperature, pressure scope
（at 12 hours power rating）
1）lubricating oil temperature : ≤105℃
2）Outlet water temperature ≤95℃
3) main oil passage oil pressure: 0.35~0.55MP(Idle ≥0.10MPa)
4）Exhaust gas temperature: ≤600℃(at manifold branch)
5）Injection pressure: 22.5+1.0Mpa
2. Tightening Torques of main bolts and nuts
1）cylinder head bolts: 320±25N.m
2）cylinder head bolts:140±20N.m
3）main bearing bolts: 250
25+
N.m
4）connecting rod bolts: 225±25N.m
5）flywheel bolts: 260±20N.m
6）fuel Injection angle bolts Palette: 130+10N.m
3. Main Adjustment Data
1）Valve clearance (cooled)
Intake valve：0.30~0.35mm exhaust valve：0.40~0.45mm
2）Compression clearance: 1.0 ~ 1.20mm
3）Commencement of fuel injection (in rank angel)
1500~1800r/min type：16±1° ; 2000~2200r/min type：25±1°
4. Valve timing (in crank angel)
Intake valve opens: before TDC 34~39°
Intake valve closes: after BDC 61~67°
Exhaust valve opens: Before BDC 76~81°
Exhaust valve closes: After TDC 26~34°

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Clearances and wear limits of main parts
No.
Description
Coordinate nature
Clearances
(mm)
Wear
limits(mm)
1
Main journal and bearing
diametral clearance
0.095~0.163
0.17
2
Crank and thrust shoe
axial clearance
0.052~0.255
0.35
3
Connecting rod journal and bearing
diametral clearance
0.059~0.127
0.16
4
Connecting rod large end and crank fillet
surfaces
axial clearance
0.15~0.35
/
5
Piston skirt and cylinder liner hole
diametral clearance
0.143~0.182
0.35~0.40
6
Piston pin and connecting rod small end
bushing hole
diametral clearance
0.045~0.066
0.10
7
First compression ring and ring grooves end surfaces
Clearance
0.07~0.102
0.28
8
Second compression ring and ring grooves end surfaces
clearance
0.04~0.075
0.26
9
Oil ring and ring groove end surfaces
clearance
0.04~0.075
0.26
10
Gap of first compression ring
in the cylinder
在标准缸径
量规内测量
measure
under the
standard
bore gauge
clearance
0.35~0.60
1.0~1.20
11
Gap of second compression ring in
the cylinder
clearance
0.25~0.40
1.0~1.20
12
Gap of oil ring in the cylinder
clearance
0.35~0.55
1.0~1.20
13
Camshaft supporting journal and bushing
hole
diametral clearance
0.04~0.12
0.20
14
Camshaft and thrust plate
axial clearance
0.10~0.40
0.55
15
Valve tappet and cylinder block tappet hole
diametral clearance
0.025~0.089
0.15
16
Intake valve rod and valve guide hole
diametral clearance
0.03~0.066
0.10
17
Exhaust valve rod and valve guide hole
diametral clearance
0.05~0.086
0.15
18
The cylinder liner protrudes organism
compaction altitude
height difference
0.02~0.07
/
19
Rocker arm shaft and rocker arm hole
diametral clearance
0.04~0.119
0.20
20
Backlash of all timing gears
clearance
0.15~0.33
0.45

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Chapter Five Marine engine Operation
Engine transportation
When the diesel engine is transported, should lift the engine by engine hooks . Moving
the engine, pay more attention to avoid damage the engine appearance , accessories , oil
pipes , panel , etc .
When long distance transportation is necessary, the air filter and silencer should be
dismantled, use plugs and plastics to seal the air intake and exhaust hole , water pump inlet
and outlet hole , fuel inlet and outlet hole . If necessary, pack the engine properly and
transport.
Installation
1. The diesel engine should install on horizontal, firm surface. When connected with
marine gear box, marine generator or other transmission equipment, its axes angle
must be adjusted and controlled in 0.13mm . The flywheel and connected axes must
keep 1.0-3.0mm clearance, to avoid damage the engine when affected by the reaction
of the axes.
2. When install the marine engine, allow 8°vertical gradient , the same gradient of
power output exes and impel axes with the parallel should no more than 0.08mm .
Users should check , measure and adjust it , to avoid big vibration cause by out of
center , then output descend and exes、flexible pin and gear tooth irregular wear ,
cause engine body and ship body.
3. User can change the engine crankshaft head independently in the allowed output , to
bring the ship necessary accessorial equipment , such as fire pump set 、fish tackle
etc . However should install transmission exes and clutch between the marine engine
and transmission equipments, not allow accessorial equipment and crankshaft be
drive by transverse reaction, to avoid damage the crankshaft.
4. Engine exhaust pipe can not be too longer, also should reduce the turning, the corner