365C Front Shovel Hydraulic System Caterpillar

Specifications

Usage:

365C PAR

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Illustration 1	g00952969
Relief valve locations (1) Cab (2) Right swing motor (3) Left swing motor (4) Main control valve (5) Pilot manifold (6) Travel motor (right) (7) Travel motor (left) (A) Bucket cylinder line (head end) (B) Boom cylinder line (head end) (C) Stick cylinder line (rod end) (D) Bottom dump cylinder line (rod end) (E) Bottom dump cylinder line (head end) (G) Signal relief valve (high pressure) (H) Signal relief valve (low pressure) (I) Bucket cylinder line (rod end) (J) Boom cylinder line (rod end) (K) Stick cylinder line (head end) (L) Left swing motor (right relief valve) (M) Left swing motor (left relief valve) (N) Right swing motor (right relief valve) (O) Right swing motor (left relief valve) (P) Margin pressure adjustment screw (rear pump) (Q) Margin pressure adjustment screw (front pump) (R) Pilot relief valve (S) Right travel crossover relief valve for forward travel (upper valve) (T) Right travel crossover relief valve for reverse travel (lower valve) (U) Left travel crossover relief valve for reverse travel (lower valve) (V) Left travel crossover relief valve for forward travel (upper valve) (W) Differential relief valve (X) Differential relief valve (Y) Control valve for counterweight cylinder

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Table 1
Relief Valve	Specifications			Torque For Locknut
Relief Valve	New	Rebuild	Service Limit	Torque For Locknut
(H) Signal relief valve (boom and stick )	32000 ± 500 kPa (4650 ± 75 psi)	32000 ± 500 kPa (4650 ± 75 psi)	30000 to 32500 kPa (4350 to 4715 psi)	60 ± 10 N·m (45 ± 8 lb ft)
(H) Signal relief valve (boom and stick )	32000 ± 500 kPa (4650 ± 75 psi)	32000 ± 500 kPa (4650 ± 75 psi)	30000 to 32500 kPa (4350 to 4715 psi)
(G) Signal relief valve (heavy lift and travel)	35000 ± 500 kPa (5075 ± 75 psi)	35000 ± 500 kPa (5075 ± 75 psi)	33000 to 35500 kPa (4790 to 5150 psi)
(G) Signal relief valve (heavy lift and travel)	35000 ± 500 kPa (5075 ± 75 psi)	35000 ± 500 kPa (5075 ± 75 psi)	33000 to 35500 kPa (4790 to 5150 psi)
(P) Margin pressure adjustment screw (rear pump)	1960 ± 50 kPa (285 ± 7 psi)	1960 ± 50 kPa (285 ± 7 psi)	1960 ± 50 kPa (285 ± 7 psi)	28 ± 7 N·m (21 ± 5 lb ft)
(Q) Margin pressure adjustment screw (front pump)	1960 ± 50 kPa (285 ± 7 psi)	1960 ± 50 kPa (285 ± 7 psi)	1960 ± 50 kPa (285 ± 7 psi)	28 ± 7 N·m (21 ± 5 lb ft)
(B) Boom cylinder line (head end)	37000 ± 500 kPa (5350 ± 75 psi)	37000 ± 500 kPa (5350 ± 75 psi)	35000 to 37500 kPa (5075 to 5440 psi)	33 ± 5 N·m (25 ± 4 lb ft)
(C) Stick cylinder line (rod end)	37000 ± 500 kPa (5350 ± 75 psi)	37000 ± 500 kPa (5350 ± 75 psi)	35000 to 37500 kPa (5075 to 5440 psi)
(J) Boom cylinder line (rod end)	34000 ± 500 kPa (4900 ± 75 psi)	34000 ± 500 kPa (4900 ± 75 psi)	32000 to 34500 kPa (4650 to 5000 psi)
(K) Stick cylinder line (head end)
(A) Bucket cylinder line (head end)
(I) Bucket cylinder line (rod end)
(D) Bottom dump cylinder line (rod end)
(E) Bottom dump cylinder line (head end)
(L) Left swing motor (right relief valve)	28950 ± 500 kPa (4200 ± 75 psi)	28950 ± 500 kPa (4200 ± 75 psi)	26960 to 29450 kPa (3910 to 4270 psi)	155 ± 29 N·m (115 ± 22 lb ft)
(M) Left swing motor (left relief valve)
(N) Right swing motor (right relief valve)
(O) Right swing motor (left relief valve)
(V) Left travel crossover relief valve (forward)	39250 ± 1500 kPa (5700 ± 220 psi)	39250 ± 1500 kPa (5700 ± 220 psi)	36250 to 40750 kPa (5260 to 5910 psi)	155 ± 29 N·m (115 ± 22 lb ft)
(U) Left travel crossover relief valve (reverse)
(S) Right travel crossover relief valve (forward)
(T) Right travel crossover relief valve (reverse)
(R) Pilot relief valve	4120 ± 100 kPa (600 ± 15 psi)	4120 ± 100 kPa (600 ± 15 psi)	4120 ± 100 kPa (600 ± 15 psi)	16 ± 1 N·m (12 ± 1 lb ft)
(W) Differential relief valve	3000 ± 50 kPa (435 ± 7 psi)	Differential relief valves should not be serviced.
(X) Differential relief valve	3000 ± 50 kPa (435 ± 7 psi)	Differential relief valves should not be serviced.
(Y) Counterweight cylinder	20600 ± 500 kPa (2990 ± 75 psi)	20600 ± 500 kPa (2990 ± 75 psi)	20600 ± 500 kPa (2990 ± 75 psi)	30 ± 2 N·m (22 ± 1 lb ft)

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Table 2
Required Tools
Part Number	Description	Qty
-	Laptop Computer	1
JERD2129	Data Subscription for All Engines and Machines	1
139-4166	Data Link Cable As	1
7X-1701 or 171-4401	Communication Adapter As or Communication Adapter As	1
7X-1425	Data Link Cable As (RS232)	1
4C-6500	Digital Thermometer	1
1U-5796	Pressure Differential Tool Gp	1
9U-7400	Multitach Tool Gp	1

Note: Use the Caterpillar Electronic Technician (Cat ET) or a Multitach in order to monitor engine speed.

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Table 3
Relief Valves		Pressure change With One Turn Of Adjustment Screw
Signal relief valves	Implement	10600 kPa (1535 psi)
Signal relief valves	Travel	7050 kPa (1025 psi)
Line relief valve		6850 kPa (1000 psi)
Swing relief valve		10000 kPa (1450 psi)
Travel crossover relief valve		10000 kPa (1450 psi)
Pilot relief valve		690 kPa (100 psi)

Note: Pressure values in Table 3 are approximate values. Use a pressure gauge for adjustment.

Preparation for Relief Valve Adjustment

Position the machine on level ground.

Stop the engine.

Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release".

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Illustration 2	g00587781
Pump compartment (1) Pressure tap (power shift pressure)

Connect a 4000 kPa (580 psi) pressure gauge to pressure tap (1) .

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Illustration 3	g01140225
Pump compartment (rear view) (2) Pressure tap (front pump delivery pressure) (3) Pressure tap (rear pump delivery pressure)

Connect a 60000 kPa (8700 psi) pressure gauge to pressure tap (2). Connect a 60000 kPa (8700 psi) pressure gauge to pressure tap (3) .

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Illustration 4	g01117935
(55) Service connector

Connect Cat ET to service connector (55) .

Start the engine.

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Illustration 5	g01117636
Monitor and keypad (50) Engine speed (51) Gain/Response (52) AEC switch (53) Gain/Response switch (54) Heavy lift switch

Place the machine controls at the following settings:
- Engine speed dial "10"
- AEC switch OFF
- Heavy lift switch OFF (digging mode)
- Gain/Response "CAT" (normal mode)
Refer to Testing and Adjusting, "Engine Performance - Test" for engine rpm settings.

Place the hydraulic activation control lever in the UNLOCKED position.

Increase the hydraulic oil temperature to 55° ± 5°C (131° ± 9°F).

Note: Normal operations of the engine and pumps are necessary for the pressure adjustments. If the results of the pressure adjustment are not correct, then the engine and the pump characteristic curve needs to be checked. Slow output flow from the pump is an indication of air in the hydraulic system. Make sure that no air is present in the hydraulic system. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release".