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IH U-21

IH U-21 power unit

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I have an International Harvester power unit.  what should the valve clearance set at.  Can't  find the information on it anywhere I've looked.  

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Might be able to buy a parts manual online for a U-21 but that wouldn't tell you. You know the cubic inches or if a tractor has the same engine?

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U-21 is the power unit version of the W-40 / T-40 tractors. Built from 1935-1942. 3.75" bore x 4.5" stroke 6 cyl's. 298 cu.in.

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On 9/14/2020 at 10:53 PM, ST-470 said:

U-21 is the power unit version of the W-40 / T-40 tractors. Built from 1935-1942. 3.75" bore x 4.5" stroke 6 cyl's. 298 cu.in.

the P40 power unit is the same engine as the w40 and t 40 tractractors. how did you come up with u21? post a picture of that unit. are you sure its not a U-12?? your talking about.

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Model Fuel Cyl's B&S HP Range Years produced Where used
A-55(91cu in) G 4 2.875x3.5 49 1959-1960 Trucks
C-60 G 4 2.625x2.75 8~15 1947-1980 Cub. Cub Lo-boy, 154, 184, 185,
D-66 D 2 3.252x4 12~15 1953-1964 D-212,DLD-2, D-214, D-215, 
D-74 D 2 3.437x4 15~19 1956-1966 D-217, D-19
D-99 D 3 3.252x4 20 1956-1966 D-320, D-322, 
D-111 D 3 3.437x4 20~26 1956-1975 D-324, D-323, D-326 
C-113 G 4 3x4 17~23 1939-1954 A, SA, C,
C-123 G 4 3.125x4 20~35 1951-1979 SC,100, 130, 140, 200, 230, 240
D-125 D 4 3.15x4 25 1951-1953 DF-25, 
FC-132 G L4 3.25x4 33 1940 Trucks
D-132 D 4 3.252x4 30~40 1956-1965 D-430, D-432, D-440
C-133 G 4     1935-1938 Trucks, P-12 power unit
C-135 G 4 3.25x4.0625 30~46 1957- 330, 340,T-340
C5-140 G 4 3.3125x4.125   1935 Trucks
C-144 G 4 3.375x4 35~ 1971-1975 354, 
D-144 D 4 3.375x4 30~40 1956-1971 B-250, B-275, 276, B-414,
C-146 G 4 3.375x4.0625 38 1964-1967 424,500
D-148 D 4 3.437x4 39 1962-1966 D-439, 
C-149 G 4     1925-1927 Trucks
C-152 G 4 3.375x4.25 24 1939-1953 H, 
C-152 G 4 3.875x3.21875 80~111 1967-1974 Trucks
C-153 G 4 3.375x4.25 47~53 1961-1971 504, 444, 2500, 3514, Scout
D-154 D 4 3.5x4 35~43 1976- 364, 434, 
GermanD-155 D 3 3.874x4.373 34~45 1967-1989 353, 383, 423, 453, 533,
C-157 G 4 3.375x4.39 50 1970-1973 454, 
C-162 G 4     1940 Trucks
C-164 G 4 3.5x4.25 31 1953-1954 SH
D-166 D 4 3.6875x3.875 40 1959-1965 TD-340,
C-169 G 4 3.5625x4.25 45 1954-1956 300
V-170 G 8     1953 Trucks
            Trucks
HD-174series G L6 3x4.125 46 1937-1940 Trucks
GD-175 G L6 3x4.125 64 1942-1946 Trucks
C-175 G 4 3.562x4.39 46 1973-1978 464, 350
GermanD-179 D 3 3.875x5.0625 50 1977-1984 484, 
             
D-188 D 4 3.6875x4.39 46 1961-1968 504 2500 3514
C-192 G L4 3.5x5 20 1921-1927 Trucks
C-196 G 4 4.125x3.656 77~111 1967-1979 Trucks
C-200 G 4 3.813x4.39 55 1968-1978 544,574,674,2500A,B,2510B,3500
C-202 G L4 3.5x5.25   1915-1926 Trucks
GermanD-206 D 4 3.845x4.375 55 1971-1984 584
C-207 G 6   59 1933-1937 Trucks
HD-213series G L6 3.3125x4.125 78 1932-1940 Trucks
GD-214 G L6 3.3125x4.125 82 1941-1946 Trucks
BD-220 G 6 3.5625x3.6875 113 1957-1968 Trucks
SD-220 G 6 3.5625x3.6875 108 1948-1968 Trucks
C-221 G 4 3.75x5 25 1923-1939 Regular,F20,T20, Trucks
C-222 G 6 3.563x3.688   1940 Trucks
C-223 G 6   78 1933-1937 Trucks
            Trucks
HD-232series G L6 3.3125x4.5 81 1937-1940 Trucks
GD-233 G L6 3.3125x4.5 93 1941-1946 Trucks
D-236 D 6 3.6875x3.6875 75 1958-1967 460 606 3616, UD-236
GermanD-239 D 4 3.875x5.0625 65 1968-1984 544,574,664,674,2500A,B,2505B,2510B2514B,3500,3514,250A,260A,684,TD-7,TD-8C,TD-8E,125
BD-240 G 6 3.5625x4.018 141 1955-1960 Trucks
SD-240 G 6 3.5625x4.018 131 1948-1957 Trucks
FAC-241 G 6 3.375x4.5 84 1941-1946 Trucks
BLD-241 G 6 3.5625x4.018 141 1958-1968 Trucks
C-242 G 6     1941-1940 Trucks
C-243 G 6     1930-1936 Trucks
V-245 G       1957-1969 Trucks
GermanD-246 D   3.937x5.06 75~77 1978-1984 784,785,H84
C-248 G 4 3.875x5.25 38 1939-1952 M,W-6,T-6
D-248 D 4 3.875x5.25 37 1941-1952 MD,WD-6,TD-6
BLD-250 G 6 3.4375x4.5 100 1941-1953 Trucks
C-251 G 4 4x5 26 1917-1920 Trucks
FAC-259 G 6 3.5x4.5 89 1941-1947 Trucks
C-260 G 6   89 1941-1940 Trucks
BLD-260 G 6     1958 Trucks
BD-261 G 6     1953 Trucks
C-263 G 6 3.5625x4.39 51-85 1959-1971 560 656 706 403 T-62
C-264 G 4 4x5.25 50 1953-1960 SM,SWD-6,400,T-61
D-264 D 4 4x5.25 50 1953-1960 SMD,SWD-6,400,TD-61
BD-264 G 6 3.6875x4.018 154 1954-1960 Trucks
BD-265 G 6 3.6875x4.018 154 1966-1968 Trucks
V-266 G 8 3.625x4.21875 155 1959-1972 Trucks
GermanD-268 D 4 3.937x5.5 75 1979-1984 884,270A
BLD-269 G 6 3.5625x4.5 103 1941-1957 Trucks
RD-372 G 6 4.375x4.125 150   Trucks
BD-279 G 6     1929-1937 WA-40,Trucks
C-279 G 6 3.625x4.5 40~67 1930-1940 T-35,PA-40, Trucks
C-281 G 4 4.125x5.25 55 1956-1958 450,T-6
D-281 D 4 4.125x5.25 49 1956-1958 450D
C-282 G 6 3.6875x4.39 95   503
D-282series D 6 3.6875x4.39 55~80 1958-1969 560,660,706,TD-9B,H30,403
BD-282 G 6 3.8125x4.125 148 1953-1969 Trucks
C-283 G 4 4.25x5 30~40 1920-1939 10-20,F-30,W-30, Trucks, P-30,P-200
C-291 G 6 3.75x4.39 70 1963-1981 706,756,766,666,H70,686,H86
BD-298 G 6   94 1931-1940 WK-40,Trucks
C-298 G 6 3.75x4.5 40~67 1935-1942 T-40,W-40, PA-50/U-21 Power Units
FBB-298 G 6 3.75x4.5 94 1937-1940 Trucks
C-301 G 6 3.8125x4.39 105 1963-1971 806,856,826
D-301 D 6 3.8125x4.39 113 1960- 503,Trucks
V-304 G 8 3.875x4.21875 147~193 1962-1980 Trucks
BD-308 G 6 3.812x4.5 154 1952-1971 Trucks
GermanD-310 D 6 3.875x4.375     706,756,686,H86,3820,165Dozer, S7,B,
            Trucks
D-312 D 6 3.875x4.4 86 1971-1982 666,H70,686,H86
FBC-318 G 6 3.875x4.5 111 1941-1942 Trucks
C-335 G 4 4.406x5.5 45 1940-1956 W9,T9
D-335 D 4 4.406x5.5 40~60 1940-1956 WD9,TD9
V-345 G 8 3.875x3.65625 157~197 1962-1985 Trucks
C-350 D 4 4.5x5.5     600,650
D-350 D 4 4.5x5.5 55~65 1956-1959 SWD9,600,650,TD91
GermanD-358 D 6 3.875x5.06     826,786,886,3088,3288,280A,3964,3965,630
D-360  D 6 3.875x5.085 80-210 1994 766,886,S9B,Trucks
FBC-361 G 6 4.125x4.5 111 1937-1947 Trucks
D-361  D 6 4.125x4.5 95-115 1963-1967 806,1206,TD-15B
RD-361 G 6     1946-1950 Trucks
D-370 D 4 4.625x5.5      
RD-372 G 6 4.375x4.125 165 1954-1969 Trucks
C-386 G 6     1925 Trucks
             
V-392 G 8 4.125x3.65625 187~236 1966-1985 Trucks
V-400 G 8 4.171875x3.6875 211 1973-1976 Trucks
FBC-401 G 6 4.125x5 114 1937-1942 Trucks
V-401 G 8 4.125x4.75 180~206 1955-1974 Trucks
GermanDT-402 D 6       650 Excavator
MV-404 G 8 4.125x3.75 188~219 1974- Trucks
RD-406 G 6 4.375x4.5 154~193 1950-1972 Trucks
D-407 D 6 4.321x4.625   1968-1971 1256,1026,1456,TD-15B,815,915,S9,
D-414 D 4 4.5x6.5 37 1936-1940 TD-35
D-414series D 6 4.3x4.75 1971-1985 1971-1985 966 1066 1086 915 530
420/6.9L D 8 4x4.125 170 1982-1987 Trucks
C-421 G 6     1925 Trucks
C-425 G 4 4.75x6 30-47 1929-1941 15-30, P-300
D-429 D 6 4.5x4.5 150 1961-1970 4100,4156,TD-20B,250, H-80
D-436series D 6 4.3x5   1971-1985 986,H186,H100,1466,1566,1486,1586,4166,4186,5088,6388,1460,1480
444/7.3L D 8   210 1993-2003 Trucks
MV-446 G 8 4.125x4.1875 235 1975- Trucks
FBC-450 G 6 4.375x5 120 1939-1942 Trucks
RD-450 G 6 4.375x5 160~202 1952-1972 Trucks
C-451 G 6   120 1937-1954 Trucks
C-461 G 4 4.75x6.5   1936-1940 T-14
D-461 D 4 4.75x6.5 43~76 1936-1940 TD-40,WD-40,TD-14,UD-14,PD-40
V-461 G 8 4.125x4.3125 226 1956-1965 Trucks
DV-462 D 8 4.5x3.625 185 1968-1972 Trucks
D-466series D 6 4.3x5.35 140-235 1971-1993 3488,TD12,175C,4366,4386,3588,3788,5288,6588,3788,6788,TD15C,E,5488.7288,7488,7388,1480,1680,540,433,412B,M10A, Trucks,ect.
V-478 G 8 4.5x3.75 209~234 1964-1977 Trucks
RD-501 G 6 4.5x4.25 181~215 1953-1974 Trucks
D-502 (UD-16) D 6 4.4x5.5 100 1948-1954 Power Units
FBD-525 G 6 4.5x5.5 107 1932-1940 Trucks
D-525 D 6 4.625x5.5 120 1954- Power Units
V-537 G 8 4.453125x4.3125 236 1976- Trucks
V-549 G 8 4.25x4.3125 227~290 1957-1977 Trucks, Power Units
DV-550/9.0L D 8 4.25x4.3125 150~210 1968-1985 1468,1586, Various trucks
D-554 D 6 4.625x5.5 85~ 1958~1962 TD15,150,151
DVT-573series D 8 4.5x4.5 180~260 1964-1984 TD-20C,250C, H90C,E. 270,E270, 65B,C. 1950Cargostar,4000COE
V-605 G/NG 8 4.625x4.5   1976- Trucks, Power units
FEB-648 G 6 5x5.5 100~140 1932-1942 Trucks,  Power units(PA-100)
D-691 D 6 4.75x6.5 75~140 1938-1962 TD-18,TD-20-201,Power Units(UD-18, PD-80)
PD-80(525) D 6 4.5x6.5 81 1936~1938 Power Units
DVT-800 D 8 5.3125x4.5 210~350 1975-1985 4568,4586,4786,7588,7788 TD-20E, 431, 433, 442, 444. 550. 4070,4370Transtar, 5070Paystar, 2524, 2624 2275 S-series
DT-817series D 6 5.375x6 235~420 1959-1983 TD-25,B,C,E. TD-30, PH-95,100,B,140,330,340.295,B. 4300, D-120C.H100C, H120C,560,Power units.
UT-817series NG 6 5.375x6 ? 1959-? Natural Gas Power Units
D-1091 D 6 5.75x7 190~235 1947-1959 TD-24, Power Units(UD-24)
U-1091 G 6 5.75x7   1954-1957 U-24 Power units
UDT-1091 D 6 5.75x7 300   Power Units

       

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On 9/8/2020 at 3:53 PM, IH U-21 said:

I have an International Harvester power unit.  what should the valve clearance set at.  Can't  find the information on it anywhere I've looked.  

the valve clearance on the298 cid  FBB engine in the WK40 is .016 hot.  so pretty safe to say this on would be the same setting.

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