HYDRAULIC SYSTEM
PUMP GPTANK GP
HYDRAULIC SYSTEM
PUMP GP#SEBP50810630
329-8116: PUMP GP-PISTON
329-8116 PUMP GP-PISTON -CUSHION-HITCH
S/N DBK1-UP
PART OF 310-5536 PUMP & MTG GP-IMPL & STEERING
S/N DBK1-UP
PART OF 310-5536 PUMP & MTG GP-IMPL & STEERING
Parts for your 621H WHEEL TRACTOR:
CATERPILLAR SIS| Pos. | Part No | Qty | Parts name | Comments |
|---|---|---|---|---|
| 1. | 379-5191 | [1] | ROTATING GP-PUMP | |
| 2. | 333-7849 | [1] | PISTON-CONTROL | |
| 3. | 189-4720 | [1] | SEAL-SHAFT | |
| 4. | 379-5197 | [1] | SWASHPLATE | |
| 5. | 379-5162 | [1] | SHAFT-DRIVE | |
| 6. | 198-5351 | [1] | PLUG | |
| 7. | 8T-7525 | [1] | SEAL-O-RING | |
| 8. | 189-4716 | [1] | SHIM (2.5-MM THK) | |
| 9. | 333-7844 | [1] | RING | |
| 10. | 203-8609 | [1] | CUP-BEARING | |
| 11. | 105-3035 | [1] | CONE-BEARING | |
| 12. | 333-7845 | [1] | BEARING-CRADLE | |
| 13. | 333-7846 | [1] | BEARING-CRADLE | |
| 14. | 204-3334 | [1] | SEAL-O-RING | |
| 15. | 6R-7943 M | [2] | SCREW (M5X0.8X15-MM) | |
| 16. | 333-7850 | [1] | BEARING-TAPERED ROLLER | |
| 17. | 8T-9597 | [1] | RING-RETAINING | |
| 18. | 6V-8337 M | [4] | BOLT-SOCKET HEAD (M8X1.25X35-MM) | |
| 19. | 9S-8005 | [3] | PLUG (3/4-16-THD) | |
| 20. | 3K-0360 | [3] | SEAL-O-RING | |
| 21. | 112-4640 | [1] | PIN | |
| 22. | 379-5187 | [1] | SPRING | |
| 23. | 333-7840 | [1] | STOP | |
| 24. | 379-5186 | [1] | VALVE GP-PUMP CONTROL | |
| 8T-8442 M | [4] | BOLT-SOCKET HEAD (M6X1X30-MM) | ||
| 280-7870 | [1] | GASKET | ||
| 25. | 280-7870 | [1] | GASKET | |
| 26. | 8T-8442 M | [4] | BOLT-SOCKET HEAD (M6X1X30-MM) | |
| 27. | 333-7843 | [1] | SPRING | |
| 28. | 379-5188 | [1] | PLATE-VALVE | |
| M | METRIC PART | |||
#SEBP50810631
376-5515: PUMP GP-PISTON
376-5515 PUMP GP-PISTON -BRAKE, CUSHION-HITCH, HYD FAN
S/N DBK1-UP
PART OF 310-5536 PUMP & MTG GP-IMPL & STEERING
S/N DBK1-UP
PART OF 310-5536 PUMP & MTG GP-IMPL & STEERING
Parts for your 621H WHEEL TRACTOR:
CATERPILLAR SIS| Pos. | Part No | Qty | Parts name | Comments |
|---|---|---|---|---|
| 1. | 378-1111 | [1] | BEARING (TAPERED) | |
| 2. | 379-1823 | [1] | SHAFT-DRIVE | |
| 3. | 379-1815 | [1] | KIT-BEARING (SWASHPLATE) | |
| (INCLUDES BEARINGS & PINS) | ||||
| 4. | 379-1816 | [1] | SWASHPLATE | |
| 5. | 379-1827 | [1] | KIT-CYLINDER | |
| (INCLUDES RING, SPRINGS, CYLINDER BLOCK, PINS, GUIDE, RETAINER & PISTON AS.) | ||||
| 6. | 379-1825 | [2] | PIN-SLOTTED | |
| 7. | 379-1818 | [1] | PLATE-CONTROL | |
| 8. | 232-3587 | [1] | KIT-BEARING | |
| 9. | 379-1821 | [1] | KIT-PISTON | |
| (INCLUDES SLEEVE, SPRING & PISTON) | ||||
| 10. | 379-1817 | [1] | SPRING-BIAS | |
| 11. | 379-1819 | [1] | KIT-PISTON (SERVO) | |
| (INCLUDES PISTON & SLEEVE) | ||||
| 12. | 248-1348 Y | [1] | VALVE GP-CONTROL (PISTON PUMP) | |
| 13. | 1G-9187 J | [1] | SEAL-LIP TYPE | |
| 14. | 6L-8797 | [1] | RING-RETAINING | |
| 15. | 379-1826 | [1] | COUPLING | |
| 16. | 8T-3957 M | [4] | BOLT-SOCKET HEAD (M12X1.75X30-MM) | |
| 17. | 8T-0348 M | [4] | BOLT-SOCKET HEAD (M16X2X50-MM) | |
| 18. | 9S-8005 | [2] | PLUG (3/4-16-THD) | |
| 19. | 3K-0360 | [2] | SEAL-O-RING | |
| 20. | 533-0059 | [1] | ADAPTER | |
| PARTS SHOWN IN GRAPHIC(S) WITHOUT A REFERENCE NUMBER ARE NOT SERVICED SEPARATELY | ||||
| AVAILABLE REPAIR KIT(S): | ||||
| 379-1829 J | [1] | KIT-SEAL (PUMP GP) | ||
| (ALSO INCLUDES 0-RINGS, SEALS, SEALING NUTS & PLUG) | ||||
| J | KIT MARKED J SERVICES PART(S) MARKED J | |||
| M | METRIC PART | |||
| Y | SEPARATE ILLUSTRATION | |||
#SEBP50810632
327-8163: ROTATING GP-PUMP
Parts for your 621H WHEEL TRACTOR:
CATERPILLAR SIS| Pos. | Part No | Qty | Parts name | Comments |
|---|---|---|---|---|
| 1. | 168-3384 | [9] | PISTON AS-PUMP | |
| 2. | 168-3380 | [1] | BARREL-CYLINDER | |
| 3. | 279-2491 | [1] | PLATE-PORT | |
| 4. | 168-3385 | [1] | PLATE-RETRACTION | |
| 5. | 168-3378 | [1] | BEARING-SPHERICAL | |
| 6. | 168-3381 | [1] | SPRING | |
| 7. | 168-3379 | [3] | PIN | |
| 8. | 6V-7723 | [1] | RING-RETAINING | |
| 9. | 168-3382 | [1] | WASHER (30X42X2.7-MM THK) |
#SEBP50810633
452-3320: ROTATING GP-PUMP
Parts for your 621H WHEEL TRACTOR:
CATERPILLAR SIS#SEBP50810634
376-2990: TANK & FILTER GP-HYDRAULIC
376-2990 TANK & FILTER GP-HYDRAULIC
S/N DBK1-UP
PART OF 310-5538 TANK & MTG GP-HYDRAULIC
S/N DBK1-UP
PART OF 310-5538 TANK & MTG GP-HYDRAULIC
Parts for your 621H WHEEL TRACTOR:
CATERPILLAR SIS| Pos. | Part No | Qty | Parts name | Comments |
|---|---|---|---|---|
| 1. | 0L-0646 | [1] | SPRING-VALVE | |
| 2. | 1U-2827 | [1] | GUIDE-VALVE | |
| 3. | 2D-4202 | [1] | PLATE | |
| 4. | 4T-8698 | [1] | WASHER (12.2X62X3.5-MM THK) | |
| 5. | 5D-1911 | [1] | COVER-HYDRAULIC CAP | |
| 6. | 5D-7927 | [1] | STRAINER AS-OIL (HYDRAULIC TANK FILL) | |
| 5F-3488 | [1] | END-STRAINER | ||
| 7. | 6E-5101 | [1] | PLATE | |
| 8. | 6J-1080 | [1] | GROMMET | |
| 9. | 7B-3039 | [1] | SPRING | |
| 10. | 7H-1447 | [1] | CAP-FILLER (HYDRAULIC TANK) | |
| 11. | 7J-2656 | [1] | SCREEN AS (HYDRAULIC TANK) | |
| 12. | 8J-8782 | [1] | BODY-DRAIN VALVE | |
| 13. | 8J-8783 | [1] | VALVE-DRAIN | |
| 14. | 8T-3298 | [2] | SEAL-RECTANGULAR | |
| 15. | 9J-7031 | [1] | PLUG-DRAIN (HYDRAULIC TANK OIL) | |
| 16. | 9M-7394 | [1] | LEVER | |
| 17. | 9T-7571 | [1] | SCREEN AS (HYDRAULIC TANK) | |
| 18. | 9T-7572 | [1] | FLANGE | |
| 19. | 9T-9227 | [1] | SCREEN AS (HYDRAULIC TANK) | |
| 20. | 103-9603 | [1] | GAUGE-SIGHT | |
| 21. | 118-8693 | [1] | SCREEN (HYDRAULIC TANK) | |
| 22. | 207-5098 | [1] | VALVE | |
| 23. | 231-9493 | [1] | RETAINER AS | |
| 24. | 231-9494 | [1] | CAP AS | |
| 25. | 243-1949 | [1] | GASKET | |
| 26. | 243-3758 | [2] | FILTER ELEMENT AS-OIL (ULTRA HIGH EFFICIENCY) | |
| 27. | 245-9740 | [1] | GASKET | |
| 28. | 253-1702 | [1] | COVER | |
| 29. | 295-6124 | [1] | STUD-TAPERLOCK | |
| 30. | 298-6576 | [1] | BASE-FILTER | |
| 31. | 300-1960 | [1] | PLATE-IDENTIFICATION (HYDRAULIC OIL LEVEL CHECK) | |
| 32. | 304-6658 | [1] | TUBE AS | |
| 33. | 319-1637 | [1] | RETAINER | |
| 34. | 346-4884 | [1] | TUBE AS | |
| 35. | 346-4885 | [1] | TUBE AS | |
| 36. | 346-4886 | [1] | TUBE AS | |
| 37. | 346-8304 | [1] | TUBE AS | |
| 38. | 347-0193 | [1] | BRACKET | |
| 39. | 358-7075 | [1] | ADAPTER | |
| 40. | 376-2991 | [1] | TANK AS | |
| 41. | 376-3056 | [1] | BRACKET | |
| 42. | 376-3057 | [1] | GASKET | |
| 43. | 164-4180 | [1] | PLUG AS | |
| 7M-8485 | [1] | SEAL-O-RING | ||
| 9S-4181 | [1] | PLUG (1-5/16-12-THD) | ||
| 44. | 170-4822 | [1] | SEAL-O-RING | |
| 45. | 192-4744 M | [8] | BOLT (M10X1.5X20-MM) | |
| 46. | 1L-5072 | [1] | DOWEL | |
| 47. | 1P-4578 | [4] | FLANGE-HALF | |
| 48. | 1P-4579 | [2] | FLANGE-HALF | |
| 49. | 1P-4582 | [6] | FLANGE-HALF | |
| 50. | 2J-7761 | [1] | RING-RETAINING | |
| 51. | 3H-2652 | [1] | SEAL-O-RING | |
| 52. | 3J-7421 | [1] | GASKET | |
| 53. | 4J-0522 | [1] | SEAL-O-RING | |
| 54. | 4J-0527 | [1] | SEAL-O-RING | |
| 55. | 5F-6222 | [1] | SEAL-O-RING | |
| 56. | 5H-4020 | [1] | COVER | |
| 57. | 5H-6005 | [4] | SEAL-O-RING | |
| 58. | 5M-2057 | [1] | SEAL-O-RING | |
| 59. | 6H-9361 | [1] | RING-RETAINING | |
| 60. | 6V-5839 | [12] | WASHER (11X21X2.5-MM THK) | |
| 61. | 6V-7731 M | [2] | BOLT (M10X1.5X70-MM) | |
| 62. | 6V-7732 M | [10] | BOLT (M10X1.5X25-MM) | |
| 63. | 6V-7744 M | [6] | LOCKNUT (M10X1.5-THD) | |
| 64. | 7F-2122 | [1] | SEAL-O-RING | |
| 65. | 8C-3206 | [4] | FLANGE-HALF | |
| 66. | 8T-0389 M | [1] | LOCKNUT (M10X1.5-THD) | |
| 67. | 8T-2275 | [1] | BALL | |
| 68. | 8T-4121 | [61] | WASHER-HARD (11X21X2.5-MM THK) | |
| 69. | 8T-4133 M | [4] | NUT (M10X1.5-THD) | |
| 70. | 8T-4137 M | [39] | BOLT (M10X1.5X20-MM) | |
| 71. | 8T-4183 M | [16] | BOLT (M12X1.75X40-MM) | |
| 72. | 8T-4196 M | [16] | BOLT (M10X1.5X35-MM) | |
| 73. | 8T-4223 | [16] | WASHER-HARD (13.5X25.5X3-MM THK) | |
| 74. | 9H-6454 | [1] | GASKET | |
| 75. | 9X-2125 M | [6] | BOLT-LOCKING (M10X1.5X25-MM) | |
| 76. | 8T-0722 M | [2] | BOLT-LOCKING (M10X1.5X30-MM) | |
| 77. | 5H-4019 | [2] | COVER | |
| 78. | 4J-0520 | [2] | SEAL-O-RING | |
| M | METRIC PART | |||
#SEBP50810635
310-5538: TANK & MTG GP-HYDRAULIC
Parts for your 621H WHEEL TRACTOR:
CATERPILLAR SIS| Pos. | Part No | Qty | Parts name | Comments |
|---|---|---|---|---|
| 1. | 8G-0841 | [2] | MOUNT AS | |
| 2. | 9X-8257 | [2] | WASHER (17.5X30X3.5-MM THK) | |
| 3. | 354-4889 | [1] | BLOCK | |
| 4. | 507-0643 | [1] | BREATHER AS (HYDRAULIC) | |
| 3D-2824 | [1] | SEAL-O-RING | ||
| 5. | 376-2990 Y | [1] | TANK & FILTER GP-HYDRAULIC | |
| 6. | 267-8821 | [4] | WASHER (17X36X12-MM THK) | |
| 7. | 3E-9411 | [4] | WASHER-HARD (17.5X38X6-MM THK) | |
| 8. | 5T-1906 | [2] | PLATE | |
| 9. | 7X-2555 M | [2] | BOLT (M16X2X80-MM) | |
| 10. | 8T-4140 M | [2] | BOLT (M16X2X60-MM) | |
| 11. | 8T-6383 M | [4] | BOLT (M16X2X200-MM) | |
| 12. | 8T-7338 M | [2] | BOLT (M16X2X45-MM) | |
| PARTS SHOWN IN GRAPHIC(S) WITHOUT A REFERENCE NUMBER ARE NOT SERVICED SEPARATELY | ||||
| M | METRIC PART | |||
| Y | SEPARATE ILLUSTRATION | |||
#SEBP50810636
328-5271: TANK & MTG GP-HYDRAULIC
328-5271 TANK & MTG GP-HYDRAULIC -REAR
S/N DBK1-UP
BRAKE COOLING, EXPANSION TANK
PART OF 322-2003 HYDRAULIC AR
Type 1
FOR USE WITH @@@@@310-4706@@@@@
S/N DBK1-UP
BRAKE COOLING, EXPANSION TANK
PART OF 322-2003 HYDRAULIC AR
Type 1
FOR USE WITH @@@@@310-4706@@@@@
Parts for your 621H WHEEL TRACTOR:
CATERPILLAR SIS| Pos. | Part No | Qty | Parts name | Comments |
|---|---|---|---|---|
| 1. | 335-8393 Y | [1] | TANK GP-HYDRAULIC (BRAKE OIL EXPANSION TANK) | |
| 2. | 344-1404 | [2] | PLATE AS | |
| 3. | 198-4778 | [12] | WASHER-HARD (13.5X30X12-MM THK) | |
| 4. | 8T-4183 M | [12] | BOLT (M12X1.75X40-MM) | |
| PARTS SHOWN IN GRAPHIC(S) WITHOUT A REFERENCE NUMBER ARE NOT SERVICED SEPARATELY | ||||
| M | METRIC PART | |||
| Y | SEPARATE ILLUSTRATION | |||
#SEBP50810637
328-5271: TANK & MTG GP-HYDRAULIC
328-5271 TANK & MTG GP-HYDRAULIC -REAR
S/N DBK1-UP
BRAKE COOLING, EXPANSION TANK
PART OF 322-2003 HYDRAULIC AR
Type 2
FOR USE WITH @@@@@310-4706@@@@@
S/N DBK1-UP
BRAKE COOLING, EXPANSION TANK
PART OF 322-2003 HYDRAULIC AR
Type 2
FOR USE WITH @@@@@310-4706@@@@@
Parts for your 621H WHEEL TRACTOR:
CATERPILLAR SIS| Pos. | Part No | Qty | Parts name | Comments |
|---|---|---|---|---|
| 1. | 344-5675 CM | [4] | NUT (M10X1.5-THD) | |
| 2. | 452-3280 CY | [1] | TANK GP-HYDRAULIC | |
| 3. | 198-4778 C | [4] | WASHER-HARD (13.5X30X12-MM THK) | |
| 4. | 8T-4183 CM | [4] | BOLT (M12X1.75X40-MM) | |
| 5. | 474-3019 C | [1] | PLATE | |
| 6. | 7X-7729 C | [8] | WASHER (11X25X3-MM THK) | |
| 7. | 8T-4185 CM | [4] | BOLT (M10X1.5X50-MM) | |
| C | CHANGE FROM PREVIOUS TYPE | |||
| M | METRIC PART | |||
| Y | SEPARATE ILLUSTRATION | |||
#SEBP50810638
335-8393: TANK GP-HYDRAULIC
335-8393 TANK GP-HYDRAULIC -BRAKE OIL EXPANSION TANK
S/N DBK1-UP
PART OF 328-5271 TANK & MTG GP-HYDRAULIC
S/N DBK1-UP
PART OF 328-5271 TANK & MTG GP-HYDRAULIC
Parts for your 621H WHEEL TRACTOR:
CATERPILLAR SIS| Pos. | Part No | Qty | Parts name | Comments |
|---|---|---|---|---|
| 1. | 4J-8251 | [1] | GROMMET | |
| 2. | 4J-8252 | [1] | GAUGE-SIGHT (HYDRAULIC TANK) | |
| 3. | 6E-2060 | [1] | COVER AS | |
| 4. | 9R-2630 | [1] | RETAINER | |
| 5. | 282-2270 | [1] | STRAINER-FUEL | |
| 6. | 306-3025 | [1] | PLATE | |
| 7. | 340-1566 | [1] | TANK AS | |
| 8T-7501 M | [4] | STUD-WELD (M10X1.5X38-MM) | ||
| 8. | 419-4904 | [1] | CAP-VENTED | |
| 9. | 155-3624 | [1] | PLUG AS | |
| 9S-4182 | [1] | PLUG (7/16-20-THD) | ||
| 3J-7354 | [1] | SEAL-O-RING | ||
| 10. | 6V-5167 | [1] | SEAL-O-RING | |
| 11. | 6V-5839 | [4] | WASHER (11X21X2.5-MM THK) | |
| 12. | 8L-2777 | [2] | SEAL-O-RING | |
| 13. | 8T-4133 M | [4] | NUT (M10X1.5-THD) | |
| 14. | 9X-2125 M | [2] | BOLT-LOCKING (M10X1.5X25-MM) | |
| M | METRIC PART | |||
#SEBP50810639
452-3280: TANK GP-HYDRAULIC
452-3280 TANK GP-HYDRAULIC -BRAKE OIL EXPANSION TANK
S/N DBK1-UP
18-L (4.8-US GAL)
PART OF 328-5271 TANK & MTG GP-HYDRAULIC
S/N DBK1-UP
18-L (4.8-US GAL)
PART OF 328-5271 TANK & MTG GP-HYDRAULIC




