or maybe this image works better
If it is part number 25, it is NSN 5330001548353, available on your favorite national auction site. It is, however, 4" wide on that site, so I'm not sure if it is a fit. That is the same wheel seal as on my M37. It is half the price at Oshkosh. They should be able to expedite it out for you with their great service.
http://www.oshkoshequipment.com/products/detail/19/3381/Inner-Wheel-Seal
Good luck.
SECTION II TM 9-2330-202-14&P
(1) (2) (3) (4) (5) (6) (7)
ITEM SMR PART
NO CODE NSN CAGEC NUMBER DESCRIPTION AND USABLE ON CODES(UOC) QTY
GROUP 13 WHEELS AND TRACK
GROUP 1311 WHEEL ASSEMBLY
FIG.12 WHEEL AND HUB ASSEMBLY
1 PAOZZ 2530011546952 11862 14035374 WHEEL,PNEUMATIC TIR................. 1
UOC:SPR,258,263
2 PAOZZ 3040011495061 19207 12313048 CAP,GREASE.......................... 1
UOC:CT1,SPR,TC1,258,263
3 PAOZZ 5315000137238 96906 MS24665-425 PIN,COTTER 1.75 INCHES LONG........ 1
UOC:CT1,TC1,257,646
3 PAOZZ 5315002368368 96906 MS24665-436 PIN,COTTER 0.75 INCHES LONG........ 1
UOC:SPR,258,263
4 PAOZZ 5340011514202 19207 12313042 RETAINER,NUT AND BO................. 2
UOC:CT1,SPR,TC1,258,263
5 PAOZZ 5310014980322 19207 12441093 NUT,PLAIN,CASTELLAT................. 1
UOC:CT1,TC1
5 PAOZZ 5310001671313 80205 AN316-16R NUT,PLAIN,HEX....................... 1
OLDER MODELS WITH LARGER HEX NUT
6 PAOZZ 5310011469635 19207 12313024 WASHER,FLAT......................... 1
UOC:CT1,SPR,TC1,258,263
7 PAOZZ 3110011654860 19207 12313045 BEARING,ROLLER,TAPE................. 1
UOC:CT1,SPR,TC1,258,263
8 PAOZZ 5330011408231 19207 12313027 SEAL,PLAIN ENCASED.................. 1
UOC:CT1,SPR,TC1,258,263
9 PAOZZ 3110001005303 1TUY2 10229 AND 10228 BEARING,ROLLER,TAPE................. 1
UOC:CT1,SPR,TC1,258,263
10 PAOZZ 5306012376844 19207 12354223 BOLT,RIBBED SHOULDE................. 8
UOC:CT1,SPR,TC1,258,263
11 PAOZZ 3040011399900 19207 12313010 HUB,BODY............................ 1
UOC:CT1,SPR,TC1,258,263
12 PAOZZ 2530011487074 19207 12313012 BRAKE DRUM.......................... 1
UOC:CT1,SPR,TC1,258,263
13 PAOZZ 5305009585258 96906 MS35190-317 SCREW,MACHINE....................... 2
UOC:CT1,SPR,TC1,258,263
14 PAOZZ 5310011490868 19207 12313047 NUT,PLAIN,HEXAGON................... 8
UOC:CT1,SPR,TC1,258,263
15 PAOZZ 2530015341110 1JUW8 BMS7388452-2 WHEEL,PNEUMATIC TIR................. 2
UOC:257,646
16 PAOZZ 5305000711788 80204 B1821BH044C125N SCREW,CAP,HEXAGON H................. 12
UOC:257,646
17 PAOZZ 5310002090965 80205 MS35338-47 WASHER,LOCK......................... 12
UOC:257,646
18 PAOZZ 5340000402367 19207 7339402 COVER,ACCESS........................ 2
UOC:257,646
19 PAOZZ 5330006294961 19207 7339403 GASKET.............................. 2
UOC:257,646
20 PAOZZ 5310007348982 19207 7348982 NUT,SLEEVE.......................... 2
UOC:257,646
21 PAOZZ 5310007349223 19207 7349223 WASHER,KEY.......................... 2
UOC:257,646
22 PAOZZ 5310007414702 19207 7414702 NUT,PLAIN,OCTAGON................... 2
UOC:257,646
12-1
23 PAOZZ 3110001004484 58536 AA59649-304 BEARING,ROLLER,TAPE CONE AND CUP 2
OUTER...............................
UOC:257,646
24 PAOZZ 5325002604882 96906 MS16625-1387 RING,RETAINING OIL SEAL............ 2
UOC:257,646
25 PAOZZ 5330001548353 14153 00044 SEAL,PLAIN ENCASED HUB BEARING..... 2
UOC:257,646
26 PAOZZ 5306011304240 96906 MS51949-2 BOLT,SHOULDER RIGHT................ 5
UOC:257,646
26 PAOZZ 5306010097117 96906 MS51949-1 BOLT,SHOULDER LEFT................. 5
UOC:257,646
27 PAOZZ 3110001005329 89346 105502H BEARING,ROLLER,TAPE................. 1
UOC:257,646
28 PBOZZ 3040011450382 19207 5599887 HUB,BODY............................ 1
UOC:257,646
29 PAOZZ 2530007860195 19207 12354239 BRAKE DRUM.......................... 1
UOC:257,646
30 PAOZZ 5305009585259 80205 MS35190-318 SCREW,MACHINE....................... 3
UOC:257,646
31 PAOZZ 5310010453709 58536 A52427-R-0.750 NUT,PLAIN,SINGLE BA RIGHT.......... 5
UOC:257,646
31 PAOZZ 5310005185566 58536 A52427-L-0.750 NUT,PLAIN,SINGLE BA LEFT........... 5