ASV SR-70 Servisní příručka stáhnout pdf (Strana 130)

6. If your reading is low, remove the cap and loosen

the jam nut on the posi-power adjustment screw

and turn it counter clockwise until it stops then

retighten the jam nut. (figure 17-11)

a) If the screw was already turned completely

out and pressure reads lower than specified,

the posi-power relief valve is faulty and should

be replaced.

b) If you were able to turn the screw out, recheck

posi-power pressure to see if the reading is

now within specification. If it is, the system

should function properly. If it did not improve,

the posi-power relief valve is faulty and should

be replaced.

To Adjust Posi-Power:

1. Loosen the jam nut and then turn the screw to

adjust for more or less posi-power function.

(figure 17 -11)

a) Turn the screw clockwise to increase function

and limit pump flow during high load condi-

tions. (less likely to stall)

b) Turn counter-clockwise to decrease function

and maximize pump flow during high load con-

ditions. (more likely to stall)

2. Tighten the jam nut while holding the set screw in

place to keep desired setting.

Auxiliary Flow Test

The PT-70/80 is equipped with both high and low flow

auxiliary circuits. If an auxiliary flow problem is sus-

pected, the following procedures should be performed.

Note: If an auxiliary circuit problem is suspected, per-

form all pressure test and adjustment procedures as

necessary prior to attempting to perform the flow test

procedure. Most issues will be solved with the pres-

sure test and adjustment procedures, but if a problem

still persists after all pressures are correctly set, pro-

ceed with the flow test.

17-6

Rubber Track Loader

17. Hydraulic Pressure & Flow

e +/- 1)

CE/ROW PT-80 Low Flow Auxiliary

0 psi 1000 psi 2000 psi 2500 psi 3000 psi

GPM (readings ar

System Load

ROW PT

80 High Flow Auxiliary

31 31

e +/-2)

ROW

High

Flow

Auxiliary

GPM (readings a

0 psi 1000 psi 2000 psi 2500 psi 3000 psi

System Load

Required Tools

Flow Meter (with variable loading valve)

0 kPa 6895 kPa 13790 kPa 17240 kPa 20680 kPa

System

load

(76 lpm)

(72 lpm)

(68 lpm)

(64 lpm)

0 kPa 6895 kPa 13790 kPa 17240 kPa 20680 kPa

System

load

(117 lpm) (117 lpm)

(114 lpm)

(98 lpm)

(7.6 lpm)

PT-70/80 Low Flow Auxiliary

PT-70/80 High Flow Auxiliary

1 2 ... 125 126 127 128 129 130 131 132 133 134 135 ... 140 141

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ASV SR-70 Servisní příručka Strana 130

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