Boom Cvl - Out secs

2.3 TRAVEL CIRCUIT

A. Travel Main Relief Valve Pressure Measurement

1. Perform Machine Preparation Procedures as described in 2.1 MACHINE PREPARATION. 2. Start engine and install special tool (refer to page 5-3 for tool dimensions) into sprocket on each side Of machine for stalling forward motion of Travel Motors. See Figure 2.9.

¯ MAKE CERTAIN SPECIAL TOOL IS SEATED

AGAINST CRAWLER FRAME AND BETWEEN

SPROCKET TEETH. NEVER ALLOW SPECIAL TOOL TO REST AGAINST CRAWLER FRAME CORNER

REINFORCEMENTS. ENGAGE TRAVEL SLOWLY & CAREFULLY UNTIL TOOL IS POSITIONED CORRECTLY SPECIAL TOOL LOCATION FOR REVERSE STALL SPECIAL TOOL LOCATION FOR FORWARD STALL

I

FIGURE 2.9

CONFIGURATION FOR SK150 THRU SK460

CO. OL /

3. Move throttle control to "HI-IDLE" place KPSS

Mode Switch in "H"-Mode See Figure 2.10. 4. Place Travel Speed Select switch in 2nd (41~) speed position. See Figure 2.10. 5. Operate both Travel controls together to full forward travel position and hold. See Figure 2.11. 6. Record reading from 700kg/cm 2 (10,000 psi)

Pressure Gauges. 7. Reposition special tool in sprockets to stall reverse travel. See Figure 2.9. 8. Repeat steps 3 and 4. 9. Operate both travel controls together to full reverse travel and hold. See figure 2.11, 10. Record reading from 700kg/cm 2 (10,000psi)

Pressure Gauges. 11.Compare readings to chart for specific model being tested on pages 2-15 through 2-22.

B. Travel Main Relief Pressure Adjustment

1. Locate TR1 and TR2 on the main control valve. See Figure 2.12 for SK200~460 example and refer to the Performance Inspection Standard Illustration for the particular machine being adjusted (Pages 2-15--2-22). 2. Loosen lock nuts and adjust each Travel Main Relief until proper pressure is achieved.

NOTE

TR1- Right Travel Main Relief Valve TR2-Left Travel Main Relief Valve 1 Rotation= Approximately 115kg/cm 2 (1640 psi) 1/4 Rotation= Approximately 58kg/cm 2 (825 psi)

3. After adjustment, securely tighten adjusting main

Iocknuts, being careful not to overtighten. SWITCH

FIGtIRE 2.10

OPERATE BOTH TRAVEL LEVERS TOGETHER FULL STROKE WORK MODE

SWITCH

Page 5.-4

FIGURE 2.11

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FIGURE 2.12