CNH LOCKING HYDRAULICS KIT XT Installation Instructions (90397252)

Out in the dirt, these machines are usually working slopes, lifting pallets, holding buckets up while you’re under them tracing leaks or swapping hoses. This locking hydraulics kit installation manual walks you through how to mount the hardware, route the lines, and tie into the existing controls so the boom and attachments stay put when they’re supposed to. Say you’re adding the kit so the arm won’t drift while you’re changing a cylinder seal—this guide helps you isolate the right circuit, install the lock valve, then test and verify it’s actually holding.

Applications & Use Cases

• Trace the existing hydraulic lines so you can route the new lock valves and hoses without rubbing, kinking, or starving a function.
• Check mounting points and brackets, then align and bolt the kit so it won’t loosen or crack under normal vibration.
• Verify electrical connections to any solenoids or switches, then test the lock function from the cab before you put it back to work.
• Inspect fittings for leaks after startup, bleed trapped air from the circuit, and re‑check operation once the oil’s warm.
• Use it to isolate a suspect valve or cylinder when diagnosing drift, so you know if the problem’s in the kit or the base machine.

FAQ

Q: Is this a PDF I can search on my laptop or phone?

A: It’s typically a standard PDF, so you can use keyword search to jump to wiring, routing, or test steps.

Q: Can I print just the pages I need to take to the jobsite?

A: Yeah, most folks print the install and test sections, stick them in a clear sleeve, and keep the rest on a device in the truck.

Safety Note

Always relieve hydraulic pressure and support any raised attachment mechanically before you crack a fitting or loosen a line.

CNH LOCKING HYDRAULICS KIT XT Index:

1 SAFETY INFORMATION
Basic instructions – Important notice regarding equipment servicing. . . . . . . . . . . . . . . . . . . . . . . 1-1
Advice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Safety rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 KIT CONTENT
Kit overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
3 GENERAL INFORMATION
Basic instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
4 PRE-ASSEMBLY
PREPARING FOR ASSEMBLY
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
5 ASSEMBLY
Install
Locking Hydraulics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
EN
EN

CNH

90397251 – LOCKING HYDRAULICS KIT (XT) (3.0 hours*)
CASE CONSTRUCTION
621G Wheel loader, Tier 4B (final), XT
linkage – 2024 Updates (Lecce Prod for NA)
621G Wheel loader, Tier 4B (final), XT
linkage – 2024 Updates (Lecce Prod for NA)
621G Tier 4B (final) – XT linkage – 2025
Updates
621G Tier 4B (final) – XT linkage – 2025
Updates
621G Tier 4B (final) – XT linkage – 2025
Updates
621G Tier 4B (final) – XT linkage – 2025
Updates
621G Tier 4B (final) – XT linkage – 2025
Updates
621G Tier 4B (final) – XT linkage – 2025
Updates
621G Wheel loader, Stage V, XT linkage
[FNH0621GNZHE13572 – ]
621G Wheel loader, Stage V, XT linkage
[FNH0621GNZHE13572 – ]
621G Wheel loader, Stage V, XT linkage
[FNH0621GNZHE13572 – ]
621G Wheel loader, Stage V, XT linkage
[FNH0621GNZHE13572 – ]
621G Wheel loader Stage 5 XT – New ZF
Transmission Control Unit
621G Wheel loader Stage 5 XT – New ZF
Transmission Control Unit
621G Wheel loader Stage 5 XT – New ZF
Transmission Control Unit
621G Wheel loader Stage 5 XT – New ZF
Transmission Control Unit
621G Wheel loader Stage 5 XT – New ZF
Transmission Control Unit
621G Wheel loader Stage 5 XT – New ZF
Transmission Control Unit
621G Wheel loader Stage V XT – High
Performance
621G Wheel loader Stage V XT – High
Performance
621G Wheel loader Stage V XT – High
Performance
621G Wheel loader Stage V XT – High
Performance
621G Wheel loader, Tier 4B (final), XT
linkage [JEE0621GNLF253010 – ]
621G Wheel loader, Tier 4B (final), XT
linkage [JEE0621GNLF253010 – ]
621G Wheel loader, Tier 4B (final), XT
linkage [JEE0621GNLF253010 – ]
621G Wheel loader, Tier 4B (final), XT
linkage [JEE0621GNLF253010 – ]
621G Wheel loader TIER 4B XT – New ZF
Transmission Control Unit
621G Wheel loader TIER 4B XT – New ZF
Transmission Control Unit
621G Wheel loader, Tier 4B (final), XT
linkage – High Performance
621G Wheel loader, Tier 4B (final), XT
linkage – High Performance
621G Tier 4B (final) – XT linkage – 2025
Updates
621G Tier 4B (final) – XT linkage – 2025
Updates
621G Tier 4B (final) – XT linkage – 2025
Updates
621G Tier 4B (final) – XT linkage – 2025
Updates
621G Tier 4B (final) – XT linkage – 2025
Updates
621G Tier 4B (final) – XT linkage – 2025
Updates
651G Wheel loader StageV XT – High
Performance
651G Wheel loader StageV XT – High
Performance
651G Wheel loader StageV XT – High
Performance
651G Wheel loader StageV XT – High
Performance
651G Wheel loader, Tier 4B (final), XT
linkage – High Performance
651G Wheel loader, Tier 4B (final), XT
linkage – High Performance
651G Tier 4B (final) – XT linkage – 2025
Updates
651G Tier 4B (final) – XT linkage – 2025
Updates
621G+ Stage V XT – Cab Upgrade
621G+ Stage V XT – Cab Upgrade
621G+ Stage V XT – Cab Upgrade
621G+ Stage V XT – Cab Upgrade
651G+ Stage V XT – Cab Upgrade
651G+ Stage V XT – Cab Upgrade
651G+ Stage V XT – Cab Upgrade
651G+ Stage V XT – Cab Upgrade
NEW HOLLAND CONSTRUCTION
W130D Wheel loader, Stage V, XT linkage
[FNHW130DNZHE14255 – ]
W130D Wheel loader, Stage V, XT linkage
[FNHW130DNZHE14255 – ]
W130D Wheel loader, Stage V, XT linkage
[FNHW130DNZHE14255 – ]
W130D Wheel loader, Stage V, XT linkage
[FNHW130DNZHE14255 – ]
W130D Wheel loader, Stage V, XT linkage
[FNHW130DNZHE14255 – ]
W130D Wheel loader, Stage V, XT linkage
[FNHW130DNZHE14255 – ]
W130D Wheel loader Stage 5 TC – New ZF
Transmission Control
W130D Wheel loader Stage 5 TC – New ZF
Transmission Control
W130D Wheel loader Stage 5 TC – New ZF
Transmission Control
W130D Wheel loader Stage 5 TC – New ZF
Transmission Control
W130D Wheel loader Stage 5 TC – New ZF
Transmission Control
W130D Wheel loader Stage 5 TC – New ZF
Transmission Control
W130D Wheel loader Stage V, TC Linkage
– High Performance
W130D Wheel loader Stage V, TC Linkage
– High Performance
W130D Wheel loader Stage V, TC Linkage
– High Performance
W150D Wheel loader Stage V, TC Linkage –
High Performance (4.0 hours*)
W150D Wheel loader Stage V, TC Linkage –
High Performance (4.0 hours*)
W150D Wheel loader Stage V, TC Linkage –
High Performance (4.0 hours*)
W130D+ Stage V – TC link- Cab Upgrade
W130D+ Stage V – TC link- Cab Upgrade
W150D+ Stage V – TC link- Cab Upgrade
W150D+ Stage V – TC link- Cab Upgrade
* – APPROXIMATE INSTALLATION TIME
Lec