Designed as a replacement front idler for the CASE 2050 crawler bulldozer, this idler is built for demanding earthmoving, construction, quarrying, and heavy-duty dozing applications.
A properly matched idler helps maintain correct track alignment and tension, while reducing abnormal wear on the track chain, track shoes, and other undercarriage components.
Our CASE 2050 idler is available for aftermarket replacement and fleet maintenance requirements, with manufacturing options to match different operating conditions.
The front idler is one of the key components in a bulldozer undercarriage system. It guides the track chain around the front of the undercarriage and works together with the recoil and track adjustment system to maintain proper track tension.
For the CASE 2050, an idler replacement should not only be dimensionally compatible. The running surface, flange profile, bearing system, seals, and overall heat treatment all affect service life in actual working conditions.
An idler may look like a relatively simple undercarriage component, but it has a direct effect on the way the track system operates.
When an idler is worn or incorrectly matched, common problems can include:
Replacing the idler at the right time can therefore help protect other undercarriage components and reduce unexpected downtime.
The front idler is one of the key components in a bulldozer undercarriage system. It guides the track chain around the front of the undercarriage and works together with the recoil and track adjustment system to maintain proper track tension.
For the CASE 2050, an idler replacement should not only be dimensionally compatible. The running surface, flange profile, bearing system, seals, and overall heat treatment all affect service life in actual working conditions.
| No. | CASE Model | Products | CASE OEM |
| 1 | 650 | Track Roller | R56593 |
| 2 | 650 | Top Track Roller | R33965 |
| 3 | 650 | Track Idler | 103384A1 |
| 4 | 650G | Track Roller | R56593 |
| 5 | 650H | Track Roller | R56593 / R57357 |
| 6 | 650K | Sprocket | 403555A1 |
| 7 | 650K-LT | Sprocket | 404060A1 |
| 8 | 650K-LGP | Sprocket | 403555A1 |
| 9 | 650K | Track Roller | R56593 / R57357 |
| 10 | 650K | Top Track Roller | R33965 |
| 11 | 650K | Track Idler | 103384A1 |
| 12 | 750H | Sprocket | R56464 |
| 13 | 750H-LGP/WT | Sprocket | R56535 |
| 14 | 750K-LGP/WT | Sprocket | 403555A1 |
| 15 | 750K-LT | Sprocket | 404060A1 |
| 16 | 750K | Track Roller | R56593 |
| 17 | 750K | Top Track Roller | R33965 |
| 18 | 750K | Track Idler | 103384A1 |
| 19 | 750L-LT | Sprocket | 404060A1 |
| 20 | 750L-LGP/WT | Sprocket | 403555A1 |
| 21 | 750M-LT | Sprocket | 404060A1 |
| 22 | 750M-LGP/WT | Sprocket | 403555A1 |
| 23 | 850 | Top Track Roller | R33965 |
| 24 | 850 | Bottom Track Roller | R56593 |
| 25 | 850B | Sprocket | R52597 |
| 26 | 850C | Sprocket | R52597 |
| 27 | 850C-LGP | Sprocket | R53117 |
| 28 | 850D | Sprocket | R52597 / R56464 |
| 29 | 850D-LGP | Sprocket | R53117 / R56535 |
| 30 | 850E | Sprocket | R56464 |
| 31 | 850G | Sprocket | R56464 |
| 32 | 850H | Sprocket | R56464 |
| 33 | 850H-LGP | Sprocket | R56535 |
| 34 | 850K | Sprocket | 404060A1 |
| 35 | 850K-LGP/WT | Sprocket | 403555A1 |
| 36 | 850K-XLT | Sprocket | 404060A1 |
| 37 | 850K | Track Idler | 103384A1 |
| 38 | 850K | Bottom Track Roller | R56593 / 419375A1 / 87581582 / 87581584 |
| 39 | 850K | Top Track Roller | R33965 |
| 40 | 850L | Track Idler | 103384A1 |
| 41 | 850L-LT/XLT | Sprocket | 404060A1 |
| 42 | 850L-LGP/WT | Sprocket | 403555A1 |
| 43 | 850M-LT | Sprocket | 404060A1 |
| 44 | 850M-LGP/WT | Sprocket | 403555A1 |
| 45 | 1150B | Sprocket | R53118 |
| 46 | 1150C | Sprocket | R53118 |
| 47 | 1150D | Sprocket | R53118 |
| 48 | 1150B–H LGP/WT | Sprocket | R53119 |
| 49 | 1150B–M | Track Idler | 366245A1 |
| 50 | 1150B–M | Top Track Roller | R33594 |
| 51 | 1150K | Sprocket | — |
| 52 | 1150K | Track Idler | 366245A1 |
| 53 | 1150K | Top Track Roller | R33594 |
| 54 | 1150M | Track Idler | 366245A1 |
| 55 | 1150M | Top Track Roller | R33594 |
| 56 | 1450 | Sprocket | R33393 / R41002 / R41003 / R29298 |
| 57 | 1450 / 1450B | Sprocket Hub | R52262 |
| 58 | 1450B | Sprocket | R52261 |
| 59 | 1450/1450B | Front Idler Group | R58832 |
| 60 | 1450B / 1550 | Carrier Roller | R33608 |
| 61 | 1550 | Sprocket Segment | VCA541 |
| 62 | 1550-LT/LGP | Sprocket Segment | VCA541 |
| 63 | 1650K-LGP | Sprocket Segment | 79107146 |
| 64 | 1650K-XLT | Sprocket Segment | 79107146 |
| 65 | 1650K | Track Roller – SF | 76004826 |
| 66 | 1650K | Track Roller – DF | 76004825 |
| 67 | 1650K | Carrier Roller | 76041361 |
| 68 | 1650K | Track Shoe | 76029769 / 79039480 / 76069524 |
| 69 | 1650K | Master Track Shoe | 76029770 / 79039481 / 76069525 |
| 70 | 1650K | Track Link | 87582739 |
| 71 | 1850K | Track Roller | — |
| 72 | 1850K | Sprocket Segment | — |
| 73 | 2050M LT | Track Roller | 47704981 |
| 74 | 2050M WT/LGP | Track Roller | 47704981 |
| 75 | 2050M XLT PAT | Track Roller | 47704981 |
| 76 | 2050M | Sprocket | 47681893 |
| 77 | 1650M | Sprocket | 47681893 |
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