6A – 50
GENERAL ENGINE MECHANICAL
NOTE:
It is most important that the correct piston grade be
used. Failure to select the correct piston grade will
result in engine failure. Always measure the cylinder
bore and select the correct piston grade.
Piston rings
Any worn or damaged part discovered during engine
overhaul must be replaced with a new one.
1. Ring end gap measurement
•
Insert the piston ring into the bore.
•
Push the ring by the piston, at a right angle to the wall,
into the point ring at which the cylinder bore diameter
is the smallest.
•
The top mark of the piston ring are shown in the
illustration.
4JB1 / 4JB1T / 4JB1TC
mm.(in)
Standard
Limit
1st
0.20 - 0.40
(0.0079 - 0.0157)
Compression
ring
2nd
0.20 - 0.40
(0.0079- 0.0157)
Oil ring
0.10 - 0.30
(0.0039 - 0.0118)
1.5
(0.059)
4JG2
mm.(in)
Standard
Limit
1st
0.20 - 0.35
(0.0079 - 0.0138)
Compression
ring
2nd
0.37 - 0.52
(0.0146 - 0.0205)
Oil ring
0.20 - 0.40
(0.0079 - 0.0157)
1.5
(0.059)
2. Measure the clearance between the piston ring groove
and the piston ring with a feeler gauge. If the piston
ring groove/piston ring clearance exceeds the
specified limit, the piston must be replaced.
4JB1 / 4JB1T / 4JB1TC
mm (in)
Standard
Limit
1st
0.090 - 0.125
(0.0035 - 0.0049)
Compression
ring
2nd
0.050 - 0.075
(0.0020 - 0.0030)
Oil ring
0.03 - 0.07
(0.0012 - 0.0028)
0.15
(0.0059)
6A-50-1.tif
6A-50-2.tif
6A-50-3.tif
Содержание NHR 4J Series
Страница 1: ...WORKSHOP MANUAL NHR NKR NPR ENGINE 4J SERIES SECTION 6...
Страница 2: ...MEMO...
Страница 58: ...00 54 SERVICE INFORMATION Cooling System and Lubrication System N m kg m lb ft...
Страница 59: ...SERVICE INFORMATION 00 55 Intake Manifold Exhaust Manifold Exhaust Pipe N m kg m lb ft 150LX004 tif...
Страница 60: ...00 56 SERVICE INFORMATION N m kg m lb ft 036LX003 tif...
Страница 61: ...SERVICE INFORMATION 00 57 Engine Electricals N m kg m lb ft 0056 1 tif...
Страница 62: ...00 58 SERVICE INFORMATION Engine Fuel N m kg m lb ft 0057 1 tif...
Страница 63: ...SERVICE INFORMATION 00 59 Engine Mounting Bracket N m kg m lb ft 0058 1 tif...
Страница 67: ...SERVICE INFORMATION 00 63 MEMO...
Страница 137: ...6A1 2 4JB1 4JB1T 4JB1TC 4JG2 ENGINE GENERAL DESCRIPTION 4JB1 TC 6A1 2 1 tif F06LX002 tif F06LX005 tif...
Страница 151: ...6A1 16 4JB1 4JB1T 4JB1TC 4JG2 ENGINE 1 PCV Hose Connect the PCV hose to the intake pipe Connect battery ground cable...
Страница 325: ...6C 66 ENGINE FUEL MEMO...
Страница 333: ...6D1 8 ENGINE ELECTRICAL MEMO...
Страница 335: ...6D2 2 STARTING SYSTEM STARTING CIRCUIT 6D2 2 1 tif...
Страница 347: ...6D3 2 CHARGING SYSTEM Generator 6D3 2 1 tif 6D3 2 2 tif...
Страница 348: ...CHARGING SYSTEM 6D3 3 CHARGING CIRCUIT 6D3 3 1 tif...
Страница 367: ...6D3 22 CHARGING SYSTEM MEMO...
Страница 369: ...6D6 2 QOSII PREHEATING SYSTEM SYSTEM DIAGRAM QOS II Timing Chart 6D6 2 1 tif 6D6 2 2 tif...
Страница 373: ...6D6 6 QOSII PREHEATING SYSTEM MEMO...
Страница 375: ...6D7 2 QOSIII PREHEATING SYSTEM SYSTEM DIAGRAM QOS II Timing Chart 6D7 2 1 tif 6D7 2 2 tif...
Страница 376: ...QOSIII PREHEATING SYSTEM 6D7 3 QOS III FLOW CHART 6D7 3 1 tif...
Страница 377: ...6D7 4 QOSIII PREHEATING SYSTEM QOS III BLOCK CHART 6D7 4 1 tif...
Страница 381: ...6D7 8 QOSIII PREHEATING SYSTEM MEMO...
Страница 387: ...6E 6 EXHAUST GAS RECIRCULATION EGR SYSTEM MEMO...
Страница 393: ...6F 6 ENGINE EXHAUST MEMO...
Страница 406: ...No HGSTG WE 661 PRINTED IN JAPAN...