Ariel JGJ Series, Technical Manual

Page: 19 / 141

F
OR
M
ODELS
: JGW, JGR
AND
JGJ S
ECTION
1 - D
ESIGN
S
PECIFICATIONS
& D
ATA
1/01 PAGE 1 - 13
T
ABLE
1-9: P
ISTON TO
B
ORE
C
LEARANCE
, P
ISTON
R
ING
E
ND
G
AP AND
W
EAR
B
AND
E
ND
G
AP AND
R
ADIAL
P
ROJECTION
, I
NCHES
- RJ
AND
HJ C
LASS
C
YLINDERS
BORE
DIAMETER
PISTON TO BORE
CLEARANCE
PISTON RING END GAP
a
a. A piston/rider ring is optional for all W and R Class cylinders and is standard for R Class cylinders
with bore diameters of 13.5 to 19.5 inches (343 to 495 mm).
WEAR BANDS - NEW
NEW MAXIMUM
END GAP
MINIMUM
RADIAL
PROJECTION
1.75 0.030 to 0.037 0.025 to 0.035 0.105 0.058 0.0075 to 0.0145
2 0.030 to 0.037 0.028 to 0.038 0.114 0.065 0.0075 to 0.0145
3.625 0.069 to 0.077 0.044 to 0.068 0.204 0.116 0.023 to 0.031
3.875 0.069 to 0.077 0.047 to 0.071 0.213 0.124 0.023 to 0.031
4.25 0.070 to 0.078 0.051 to 0.075 0.225 0.136 0.023 to 0.031
4.625 0.070 to 0.078 0.056 to 0.080 0.240 0.148 0.023 to 0.031
5.125 0.073 to 0.081 0.061 to 0.085 0.255 0.164 0.023 to 0.031
5.5 0.073 to 0.081 0.065 to 0.089 0.267 0.176 0.023 to 0.031
6 0.079 to 0.087 0.072 to 0.112 0.336 0.192 0.025 to 0.033
6.375 0.079 to 0.087 0.077 to 0.117 0.351 0.204 0.025 to 0.033
7 0.085 to 0.093 0.084 to 0.124 0.372 0.224 0.028 to 0.036
7.375 0.085 to 0.093 0.089 to 0.129 0.387 0.236 0.028 to 0.036
8 0.090 to 0.099 0.096 to 0.136 0.408 0.256 0.030 to 0.038
8.375 0.090 to 0.099 0.101 to 0.141 0.423 0.268 0.030 to 0.038
9.25 0.094 to 0.103 0.111 to 0.151 0.453 0.296 0.032 to 0.040
9.75 0.094 to 0.103 0.117 to 0.157 0.471 0.312 0.032 to 0.040
10.375 0.097 to 0.106 0.124 to 0.164 0.492 0.332 0.032 to 0.042
11 0.100 to 0.109 0.131 to 0.179 0.537 0.352 0.032 to 0.042
11.5 0.100 to 0.109 0.138 to 0.186 0.558 0.368 0.032 to 0.042
13 0.108 to 0.117 0.155 to 0.203 0.609 0.415 0.034 to 0.044
13.5 0.108 to 0.117 0.162 to 0.210 0.630 0.432 0.034 to 0.044
15.25 0.115 to 0.126 0.183 to 0.231 0.693 0.488 0.036 to 0.046
15.75 0.115 to 0.126 0.189 to 0.237 0.711 0.504 0.036 to 0.046
16.75 0.123 to 0.134 0.201 to 0.251 0.753 0.536 0.038 to 0.048
17.25 0.123 to 0.134 0.207 to 0.259 0.777 0.552 0.038 to 0.048
19 0.131 to 0.142 0.228 to 0.292 0.876 0.608 0.037 to 0.049
19.5 0.131 to 0.142 0.234 to 0.298 0.894 0.624 0.037 to 0.049