349-1756 3491756 Pressure Switch Excavator Spare Parts For C2.4 C3.3B 303.5E 304E 305.5E 305E

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Brand Name :	OEM
Model Number :	349-1756 3491756
Price :	10 USD / pcs
Payment Terms :	T/T, D/P, D/A,Western Union, L/C, MoneyGram
Supply Ability :	100-2000
Delivery Time :	3-7 working days

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Product Details
Company Profile

349-1756 3491756 Pressure Switch Excavator Spare Parts For C2.4 C3.3B 303.5E 304E 305.5E 305E

349-1756 3491756 Pressure Switch Excavator Spare Parts For C2.4 C3.3B 303.5E 304E 305.5E 305E

Specifiion

Category	Battery & Wiring GP
Name	Pressure Switch
Parts No	349-1756 3491756
Machine Number	303.5E 304E 305.5E 305E 308E 308E CR
Lead time	1-3 DAYS
Quality	Brand new, OEM quality
MOQ	1 PCS
Means of transport	By sea/air, DHL FEDEX UPS TNT
Packing	As request or standard packing

Key functions & working principle

Working Principle	1. The pressure switch is mounted to a pressure port in the target system (hydraulic, fuel, oil), with the diaphragm exposed to the fluid pressure
	2. When fluid pressure reaches the factory-set threshold:
	- For NC switch (low-pressure alarm): Pressure drops below threshold → diaphragm retracts → spring actuates switch → circuit opens → triggers warning light/alarm (e.g., low oil pressure)
	- For NO switch (high-pressure alarm): Pressure exceeds threshold → diaphragm expands → pushes piston → switch closes → circuit activates → triggers shutdown/alert (e.g., hydraulic overpressure)
	3. When pressure returns to normal range, the diaphragm and internal spring reset the switch to its original state (NC/NO), restoring the electrical circuit
Core Functions	1. Real-Time Pressure Monitoring: Continuously tracks fluid pressure in critical systems to ensure operation within safe limits
	2. Fault Alert/Protection: Triggers operator warnings (dashboard light/buzzer) or automatic protective actions (engine shutdown, hydraulic pump deactivation) if pressure is outside preset range – prevents component damage (e.g., pump seizure from low oil pressure, cylinder burst from overpressure)
	3. System Diagnostics: Provides electrical feedback to the equipment’s ECM (Engine Control Module) for fault code generation – simplifies troubleshooting (e.g., code P0521 for oil pressure sensor failure)
	4. Compatibility with Equipment Controls: Integrates with the machine’s electrical system to enable seamless interaction with other safety/control components

Compatible models

MINI HYD EXCAVATOR 303.5E 304E 305.5E 305E 308E 308E CR C.ater.pillar.

More other switch applied to C A T heavey machine

1728660 SWITCH GP-LIQUID LEVEL

305.5, 306, 307D, 308D, 308E, 308E2 CR, 312C, 315C, 3406C, 3456, 3508, 3508B, 3508C, 3512, 3512B, 3512C, 3516, 3516B, 3516C, 5110B, 5130B, 5230, 5230B, 533, 543, 584, 776D, 777, 777B, 777C, 777D, 777F...

2661406 SWITCH AS-ROCKER

303.5C, 303.5E, 303C CR, 303E CR, 304C CR, 304E, 305.5E, 305C CR, 305E

2220225 SWITCH AS-PUSH BUTTON

303.5E, 303E CR, 304E, 305.5E, 305E, 306E, 307D, 308D, 308E CR, 308E SR, 311D LRR, 311F LRR, 312D, 312D L, 312D2, 312D2 GC, 312D2 L, 312E, 312E L, 313D, 313D2, 313D2 LGP, 314D CR, 314D LCR, 314E CR, 3...

1863792 SWITCH-LEVEL

303.5E, 303E CR, 304E, 305.5E, 305E, 308E CR, 308E SR, 311D LRR, 311F LRR, 312D L, 312E, 314C, 314D CR, 314E CR, 314E LCR, 315D L, 316E L, 318E L, 319D L, 320C, 320D, 320D L, 320D RR, 320E, 320E L, 32...

3879910 SWITCH-PRESSURE

303.5E, 303E CR, 304E, 305.5E, 305E, 306E, 307E, 308E, 308E CR, 308E SR, 901C, 902C, 903C

3830521 SWITCH AS

303.5E, 304E, 305.5E, 305E, 901C, 902C, 903C

3790817 SWITCH AS-ROCKER

303.5E, 304E, 305.5E, 305E, 308E, 308E2 CR

3790820 SWITCH AS-ROCKER

308E, 308E2 CR

3790821 SWITCH AS-ROCKER

308E, 308E2 CR

3790818 SWITCH AS-ROCKER

308E, 308E2 CR

3623223 SWITCH AS-PRESSURE

303.5E, 303E CR, 304E

3935862 SWITCH AS-ROCKER

304E, 305E

3830521 SWITCH AS

303.5E, 304E, 305.5E, 305E, 901C, 902C, 903C

3879910 SWITCH-PRESSURE

303.5E, 303E CR, 304E, 305.5E, 305E, 306E, 307E, 308E, 308E CR, 308E SR, 901C, 902C, 903C

3860798 SWITCH AS

301.7D, 302.2D, 302.4D, 302.7D

3860741 SWITCH-PRESSURE

302.7D

3860560 SWITCH-SOLENOID

302.7D

3860559 SWITCH-SOLENOID

302.7D

4164286 SWITCH-TEMPERATURE

305.5E, 306E

3835752 SWITCH GP-POSITION

314E CR, 314E LCR

3790818 SWITCH AS-ROCKER

308E, 308E2 CR

Directory listing

Pos.	Part No	Qty	Parts name	Comments
1	349-1812	[1]	SWITCH AS-PRESSURE (PILOT OIL)
	108-7516	[1]	FITTING
	3J-1907	[1]	SEAL-O-RING
	349-1756	[1]	SWITCH AS-PRESSURE (PILOT OIL)
	9X-3402	[2]	SOCKET-CONNECTOR (16-GA TO 18-GA)
			-OR-
	126-1768	[2]	SOCKET-CONNECTOR (14-GA TO 16-GA)
	230-4011	[1]	PLUG AS-CONNECTOR (2-PIN)
2	1S-1150	[2]	SPACER (0.391X0.5X0.19-IN THK)
3	3S-2093	[18]	STRAP-CABLE
4	7K-1181	[17]	STRAP-CABLE
5	8T-8799	[1]	BOOT (RED)
6	111-4837	[3]	CLIP
7	119-9880 M	[1]	BOLT (M12X1.25X30-MM)
8	153-5656	[1]	BATTERY (12-VOLT, MAINTENANCE FREE)
9	163-6795	[1]	STRAP-CABLE
10	215-3717	[1]	GROMMET
11	266-6935	[1]	RELAY AS (12-VOLT)(START)
12	266-7379	[4]	STRAP-CABLE
13	267-4768	[2]	ROD
14	275-0553	[1]	BAR-BUS
15	282-2151	[1]	GROMMET
16	298-0663	[2]	CLIP (LADDER)
17	327-6207 Y	[1]	RELAY GP (12-VOLT)(MAIN POWER)
18	376-9480	[1]	SENDER AS-FUEL LEVEL (TANK)
		[1]	GASKET
	102-8802	[1]	KIT-RECEPTACLE (2-PIN)
			(INCLUDES RECEPTACLE AS & WEDGE)
19	398-6363 Y	[1]	RELAY GP (12-VOLT)(GLOW PLUG)
20	453-8484	[1]	CLAMP AS
21	458-0726	[1]	PLATE AS
22	464-1207 Y	[1]	HARNESS AS-SENSOR
23	464-1210	[1]	GROMMET
24	464-1211	[1]	PLATE
25	479-4290	[1]	CABLE AS-STARTER
	8C-5064 E		CONDUIT-FLEXIBLE (17.75-MM ID, SPLIT)(10-CM)
	9X-4519	[1]	BOOT (RED)
	031-9292	[1]	RING-TERMINAL
	127-5483	[1]	PLUG AS-CONNECTOR (1-PIN)
	159-8049 E		CABLE (00-GA, RED)(214-CM)
	292-2893 E		CONDUIT (10.1-MM ID)(33-CM)
	3S-6049	[1]	TERMINAL AS-BATTERY (POSITIVE)
		[1]	BOOT AS
	8L-8413	[1]	STRAP-CABLE (WHITE)
26	505-8092 Y	[1]	HARNESS AS-CHASSIS
27	095-0736 M	[6]	SCREW-MACHINE (M5X0.8X10-MM)
28	132-5789	[1]	CLIP (LADDER)
29	1S-1015	[1]	CLIP (LOOP)
30	204-1611	[3]	STRAP (DUAL)
31	2V-1771	[2]	GROMMET
32	309-4314	[1]	CLIP (LADDER)
33	4P-7429	[1]	CLIP (LADDER)
34	5C-2890 M	[4]	NUT (M6X1-THD)
35	5C-7261 M	[2]	NUT (M8X1.25-THD)
36	5H-4744	[1]	SPACER (13.5X25X11-MM THK)
37	5P-1076	[1]	WASHER-HARD (13.5X30X4-MM THK)
38	5P-4115	[2]	WASHER-HARD (7.2X19X2-MM THK)
39	7I-2272 M	[1]	BOLT (M5X0.8X12-MM)
40	8T-0328	[1]	WASHER-HARD (5.5X10X1-MM THK)
41	8T-4121	[8]	WASHER-HARD (11X21X2.5-MM THK)
42	8T-4136 M	[5]	BOLT (M10X1.5X25-MM)
43	8T-4137 M	[3]	BOLT (M10X1.5X20-MM)
44	8T-4139 M	[1]	BOLT (M12X1.75X30-MM)
45	8T-4189 M	[2]	BOLT (M8X1.25X20-MM)
46	8T-4200 M	[2]	BOLT (M8X1.25X16-MM)
47	8T-4223	[2]	WASHER-HARD (13.5X25.5X3-MM THK)
48	8T-4224	[6]	WASHER-HARD (8.8X16X2-MM THK)
49	8T-4244 M	[1]	NUT (M12X1.75-THD)
50	9M-8406	[1]	CLIP (LOOP)
51	9X-2480 M	[2]	BOLT (M6X1X45-MM)
	E		ORDER BY THE CENTIMETER
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

We could supply the following spare parts

1 Hydraulic parts: hydraulic pump, main valve, hydraulic cylinder, final drive, travel motor, swing machinery, swing motor etc.

2 Engine parts: engine ass’y, piston, piston ring, cylinder block, cylinder head, crankshaft, turbocharger, fuel injection pump, starting motor and alternator etc.

3 Undercarriage part: Track roller, Carrier roller, Track Link, Track shoe, Sprocket, Idler and Idler cushion etc.

4 Cab parts: operator’s cab, wiring harness, monitor, controller, seat, door etc.

5 Cooling parts: Radiator, air conditioner, compressor, after cooler etc.

6 Other parts: Service kit, swing circle, engine hood, swing joint, fuel tank, filter, boom, arm, bucket etc.

Packing and Shipping

Packing Details :

inner packing : plastic film for wrapping

external packing : wooden

Shipping :

within 3 days after received the payment , by air or by express or by sea on the basis of the

quantity and emergency circumstances.

1. By Couriers: DHL, UPS, FEDEX, TNT are the main courier companies we are cooperated,

2. By Air: Delivery from the Guangzhou air port to customer's destination city air port.

3. By Sea: Delivery from the Huangpu port .

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349-1756 3491756 Pressure Switch Excavator Spare Parts For C2.4 C3.3B 303.5E 304E 305.5E 305E

349-1756 3491756 Pressure Switch Excavator Spare Parts For C2.4 C3.3B 303.5E 304E 305.5E 305E

349-1756 3491756 Pressure Switch Excavator Spare Parts For C2.4 C3.3B 303.5E 304E 305.5E 305E

excavator pressure switch spare parts

C2.4 C3.3B pressure switch

303.5E 304E excavator parts

349-1756 3491756 Pressure Switch Excavator Spare Parts For C2.4 C3.3B 303.5E 304E 305.5E 305E

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