Yanmar 3JH3E - 4-4 Piston; 4-5 Piston ring

Chapter 10 Disassembly and Reassembly
.... 4 ....... T;;;.,;;.ab;;.;l_e_o_f_S_t;.;.a_n.;.d.;.;.ar_d_N_f e_a_s_u_r_e_m_e_n_ts_fo_r_A:_Ia_i_n_te_n_a_n_c_e _____________ .1,4JH3(B)(CJE
4-4 Piston
Model
ltem
Piston outer dia.
L mark
ML mark
Piston outer dia.
MS mark
S mark
Minimum
gap between pistons and cylinders
Top clearance
Piston and Piston pin
4-5 Piston ring
Item
Top ring
Second ring
Oil ring
Printed
in Japan
HIXSHl•H8009
Piston pin outer dia.
Piston pin hole inner dia.
Oil clearance
Model
--------------
·--------
Ring groove width
B measurements
Minimum gap between groove and ring
Clearance
Ring groove width
B measurements
Minimum gap between groove
and ring
Clearance
Ring groove width
B measuremenls
Minimum gap between groove and ring
Clearance
10-37
(mm}
3JH3{B)(C}E
4JH3(B)(C)E
Standard Limit
83.945~83.975
83.965~83.975
83.960~83.965
83.90
83.955~83.960
83.945~83.955
0.040~0.070
~~--
0.660~0.780
---
25.987~26.000 25.90
26.
000~26 .009
26.02
0.000~0.022
0.12
(mm)
3JH3(B)(C)E
4JH3{B)(C)E
Standard
limit
2.065~2.080
--
i.970~1.990
--
0.075~0.110
--·~
0.200~0.400
1.5
2.035~2.050
~- ..... ---
1.970~1.990
--
0.045~0.080
~-
0.200~0.400
1.5
4.015~4.030
-·~·~
3.970~3.990
-"'"~
0.025~0.060
-MM-
0.200~0.450
1,5