Controller
| Machine | Model | Years |
|---|---|---|
| Excavator | CX37C | 2020 |
| Excavator | E37C | 2020 |
| Excavator | E37C | — |
| Excavator | CX17C | — |
| Excavator | CX37C | — |
| Excavator | CX33C | — |
| Excavator | CX30C | — |
| Excavator | CX26C | — |
| Excavator | E26C | — |
| Excavator | E17C | — |
OEM Controller Auxiliary Hydraulic Circuit Joystick Var. 405002 405005 #21Q9 - OEM Electrical Service Part for Heavy Equipment Control Repair When maintenance teams replace failed parts to correct failed relays, weak switching, poor contact, and inconsistent machine operation, this OEM component supports repairs related to sticking controls, worn contacts, and unreliable electrical command signals. Well suited to electrical control repair, machine switch replacement, and Case equipment relay service maintenance and replacement workflows.
More Details
Part Number: 21Q9
Application: Typical repair use: OEM service component used in control-circuit repairs involving no-response switches, failed relays, or weak solenoid engagement.
Key Features:
- OEM replacement for failed switches, worn contacts, or sticking control components
- Helps restore reliable actuation, electrical response, and system control
- Direct-fit service part for repair and routine replacement work
Fits Case Models: Compatible with various Case construction equipment models - verify fitment before ordering
Replaces: Refer to manufacturer cross-reference if applicable
- Manufacturer part number
- 21Q9-90030
- Internal SKU
- IC:21Q9-90030
- Brand
- CASE CONSTRUCTION
- Condition
- OEM, new
- Category
- Case Construction
- Weight
- 0.93 lb
Free pickup at any of our 17 branches across Ohio, Indiana, Michigan, and Kentucky. Select your preferred branch at checkout.
30-day no-fault returns. Bought the wrong part? Send it back for a full refund — no restocking fees, no minimums.
All 12 fitments
| Machine | Model | Years |
|---|---|---|
| Excavator | CX37C | 2020 |
| Excavator | E37C | 2020 |
| Excavator | E37C | — |
| Excavator | CX17C | — |
| Excavator | CX37C | — |
| Excavator | CX33C | — |
| Excavator | CX30C | — |
| Excavator | CX26C | — |
| Excavator | E26C | — |
| Excavator | E17C | — |
| Excavator | E30C | — |
| Excavator | E33C | — |