Sheffer C20 SERIES - Manual (Page 3)

CLEVIS
MOUNT
TRUNNION
MOUNT
EFFEC- EFFEC-
MM TIVE TIVE
ROD AREA AREA 50 PSI 80 PSI 90 PSI 100 PSI 150 PSI
BORE DIA. PUSH PULL PUSH PULL PUSH PULL PUSH PULL PUSH PULL PUSH PULL
1 1 / 2 1 / 2 1.767 1.571 88.4 78.6 141.4 125.7 159 141.4 176.7 157.1 265 235.6
2 1 / 2 3.14 2.946 157 147.3 251.2 235.7 282.6 265.1 314 294.6 471 441.9
2 1 / 2 5 / 8 4.91 4.60 245.5 230 392.8 368 441.9 414 491 460 736.5 690
3 3 / 4 7.07 6.63 353.5 331.5 565.6 530.4 636.3 596.7 707 663 1060 994.5
3 1 / 2
3 / 4 9.62 9.18 481 459 769.6 734.4 865.8 826.2 962 918 1443 1377
4 1 12.57 11.78 628.5 589 1006 942.4 1131 1060 1257 1178 1886 1767
5 1 19.64 18.85 982 942.5 1571 1508 1768 1696 1964 1885 2946 2828
6 1 28.27 27.49 1414 1374 2262 2199 2544 2474 2827 2749 4240 4124
7 1 1 / 4 38.49 37.26 1924 1863 3079 2981 3464 3353 3849 3726 5774 5589
8 1 3 / 8 50.27 48.78 2514 2439 4022 3902 4524 4390 5027 4878 7540 7317
10 1 3 / 4 78.54 76.13 3927 3807 6283 6090 7069 6852 7854 7613 11781 11420
FORCE DEVELOPED ON PUSH STROKE FORCE DEVELOPED ON PULL STROKE
Force (in lbs.) = Area of Piston (in sq. inches) times
Pressure (in psi). Force (in lbs.) = Area of Piston (in sq. inches) less Area
of Rod (in sq. inches) times Pressure (in psi).
F=AP F=(Ap-Ar) P
Parts List
ITEM QUANTITY
NUMBER DESCRIPTION REQUIRED
1 HEAD 1
2 CAP 1
3 PISTON ROD 1
4 TUBE 1
5 TIE ROD 4, 6, 8
9 PISTON 1
13 TIE ROD NUT ‡
14 PISTON ROD NUT 1
16 A† TUBE SEAL – O-RING 2
16 B† TUBE SEAL – GASKET 2
18 † PISTON SEAL 2
21 † ROD BEARING 1
24 † ROD WIPER 1
25 ROD PACKING 1
27 ROD PACKING SUPPORT WASHER 1
28 ROD PACKING RETAINING RING 1
29 CUSHION PISTON **
30 CUSHION ADJ. SCREW *
31 † SEAL – CUSHION ADJ. *
33 † CUSHION SEAL – FRONT *
43 † CUSHION SEAL – REAR *
71 CUSHION INSERT – FRONT *
72 CUSHION INSERT – REAR *
112 CLEVIS PIN AND RETAINERS 1
117 INTERMEDIATE TRUNNION 1
†Recommended Spare Parts
*As required: specify if cushioned front, cushioned rear or cushioned both ends.
**Used on all cushioned front cylinders. Used on cushioned rear cylinders bore sizes 1
1 / 2 " and 2 " only.
‡As required – depends on bore size and mounting.
112
117
Parts List
Theoretical Force in Pounds at Various Pressures (In PSI)
1 C20-2