| Parameter | Specification |
|---|---|
| Part Number | 714-11-16840 |
| Product Name | Komatsu Solenoid Valve |
| Supplier / Channel | COGENG (Factory Direct Supply) – OEM-Spec Replacement |
| Valve Type | Electro-Hydraulic Solenoid Valve |
| System Voltage | 24V DC (Standard Komatsu wheel loader electrical system) |
| Application | Transmission Control, Hydraulic Pilot Shut-off, or Brake/Steering System (varies by model) |
| Compatible Models | Komatsu WA320-3, WA120-3, WA180-3, WA250-3 (Also may fit WA350-3, WA380-3, depending on serial number configuration) |
| Connector Type | 2-Pin Weather-Resistant Sealed Connector |
| Coil Resistance (Typical) | 15–30 Ω (Verify using your machine's Shop Manual) |
| Working Pressure Range | Up to 35 bar (Pilot/Control circuits) |
| Mounting | Threaded cartridge or flange mount (confirm per your specific sub-system) |
WARNING: Wheel Loader Unexpected Movement Hazard
Secure the Machine: Before servicing the 714-11-16840 solenoid valve:
Park on a flat, level solid surface. Lower the bucket and any attachments completely to the ground.
Engage the parking brake firmly.
Turn the engine OFF, remove the ignition key.
Disconnect the negative battery cable from the battery.
Cycle the steering wheel, bucket control lever, and transmission shifter through all positions 5+ times to discharge stored hydraulic pressure.
Hot Component Risk: If this solenoid is located on the transmission valve body or near the engine bay, it can reach extreme temperatures during operation. Allow the machine to cool for 30 minutes before beginning work. Wear heat-resistant gloves when accessing the solenoid.
Contamination Prevention: The hydraulic systems in WA Dash-3 loaders operate at tight clearances. Before removing the old solenoid, steam-clean or pressure-wash the area around the valve and blow dry with compressed air. Immediately cap any open ports or lines after removal. Dirt entering the system will cause transmission clutch failure or hydraulic pump damage.
*Typical assembly breakdown for Komatsu 714-11-16840 solenoid valve installation (confirm exact configuration from your machine's parts book).*
| Diagram Ref. | Part Description | Notes |
|---|---|---|
| 1 | Solenoid Valve Assembly | 24V DC coil + hydraulic valve cartridge (714-11-16840) |
| 2 | Mounting O-Ring | Static seal between valve body and manifold (Included with new solenoid) |
| 3 | Backup Ring | Prevents O-Ring extrusion at high temperatures (May be included) |
| 4 | Valve Manifold / Block | Transmission control valve body or hydraulic block |
| 5 | Harness Connector (Machine Side) | 2-Pin sealed plug; inspect locking tab and pin condition |
| 6 | Mounting Bolt(s) | Secure solenoid flange to manifold (Torque to 8–12 Nm) |
Installation Procedure (English Summary)
Identify Location: Confirm the solenoid being replaced matches the part number 714-11-16840 stamped on the old unit. Refer to your machine's Parts Manual for exact location (Transmission, Pilot manifold, or Implements control block).
Disconnect and Clean: Unplug the electrical harness. Thoroughly clean the area around the solenoid base to prevent contamination.
Remove Old Solenoid: Remove mounting bolts. Pull the old solenoid straight out. If it is a threaded cartridge style, use the correct hex socket or wrench flat — never use pipe wrenches or vise grips which will distort the cartridge housing.
Lubricate and Install: Apply clean hydraulic oil to the new O-ring. Insert the new COGENG 714-11-16840 valve straight into the cavity. Do not force it at an angle; if resistance is felt, remove and check O-ring alignment.
Torque: Tighten flange bolts or cartridge body to the correct torque specification. Overtorquing strips the aluminum manifold threads immediately.
Reconnect: Press harness connector until positive click. Check that the seal is fully seated around the back of the connector to prevent water intrusion.
Test Operation: Start engine, run at idle for 5 minutes, check for fluid leaks. Cycle the function controlled by the solenoid (e.g., transmission through F-N-R, or raise/lower bucket) to confirm proper response.
| № | Number | Name | Qty |
| SERIAL NO. IN ( ) INDICATES TRANSMISSION SERIAL NO. | |||
| 714-16-20001 | TRANSMISSION ASS'Y THESE ASSEMBLIES CONSISTS OF ALL PARTS SHOWN IN FIGS.F4350-51A0 TO F4350-68A0 | 1 | |
| 714-16-25030 | • CONTROL VALVE ASS'Y,T/M ASS'Y THIS ASSEMBLY CONSISTS OF ALL PARTS SHOWN IN FIGS.F4350-61A0 TO F4350-63A0A | 1 | |
| 714-11-16200 | •• VALVE ASS'Y,LOWER ASS THIS ASSEMBLY CONSISTS OF ALL PARTS SHOWN IN FIGS.F4350-62A0 TO F4350-63A0A | 1 | |
| 714-11-16900 | ••• VALVE ASS'Y,SOLENOID | 1 | |
| 1 | 714-11-16800 | ••• BODY ASS'Y,SOLENOID | 1 |
| 2 | 714-11-16830 | ••• SOLENOID VALVE | 2 |
| 3 | 714-11-16840 | ••• SOLENOID VALVE | 2 |
| 4 | 714-11-16811 | ••• BRACKET | 1 |
| 5 | 01010-80816 | ••• BOLT | 2 |
| 6 | 01643-30823 | ••• WASHER | 2 |
| 7 | 08034-00414 | ••• BAND | 2 |
| 8 | 01010-81085 | ••• BOLT | 1 |
| 9 | 01011-81015 | ••• BOLT | 1 |
| 10 | 01011-81015 | ••• BOLT | 4 |
| 11 | 01010-81085 | ••• BOLT | 2 |
| 12 | 01010-81085 | ••• BOLT | 1 |
| 13 | 01643-31032 | ••• WASHER | 10 |
| 14 | 195-30-34260 | ••• WASHER | 1 |
| 15 | 419-06-12840 | ••• PLATE | 1 |
| 16 | 07043-70108 | ••• PLUG | 1 |
| 17 | 419-15-16811 | •• GASKET,UPPER | 1 |
| 18 | 01010-80860 | •• BOLT | 1 |
| 19 | 01010-80875 | •• BOLT | 1 |
| 20 | 419-15-16660 | •• FILTER ASS'Y | 1 |
| 419-15-16930 | ••• ELEMENT | 1 | |
| 419-15-16940 | ••• HEAD | 1 | |
| 419-15-16950 | ••• O-RING | 1 | |
| 419-15-16960 | ••• CASE,FILTER | 1 | |
| 21 | 07000-02014 | •• O-RING | 2 |
| 22 | 01010-81035 | •• BOLT | 2 |
| 23 | 01602-01030 | •• WASHER | 2 |
| 24 | 01642-21016 | •• WASHER | 2 |
| 29 | 708-1S-15350 | •• SEAT | |
| 30 | 708-1S-15360 | •• SEAT | |
| 31 | 708-3T-15811 | •• ORIFICE | |
| 32 | 702-21-60700 | •• PILOT VALVE | |
| 33 | 01252-60635 | •• BOLT | |
| 34 | 708-8E-16150 | •• PLUG | |
| 35 | 07002-11023 | •• O-RING | |
| 36 | 20B-27-11210 | •• BLEEDER |
Q: What are the symptoms of a failing 714-11-16840 solenoid on a WA250-3?
A: Common signs include harsh or delayed transmission shifting, specific gears failing to engage, erratic implement response, or the machine failing to move. This solenoid is critical for regulating pilot pressure to the transmission control valve.
Q: Does the 714-11-16840 fit all WA-3 series Komatsu loaders?
A: This solenoid valve is a direct fit for the WA120-3, WA180-3, WA250-3, and WA320-3 models. It is a common component shared across these mid-size WA-3 series platforms. Always verify the OEM part number stamped on your original valve before ordering.
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