How To Set The Hydraulic Breaker Relief Valve - Toku TNB-08M Service Manual

MP (PSI) 290 725
64.5 64
Q (gpm)
Excavator A → The relief valve setting is too low. Increase the relief valve setting. After the adjustments
Excavator B → The flow is acceptable but the back pressure is too high. Check and inspect the breaker
Excavator C → Flow is low. The breaker can be operated at the lower specification level but the impact
Excavator D → Data is good. Set the throttle lever to the hydraulic breaker position.
7 – 4. How to set the Hydraulic Breaker Relief Valve
Proceed as follows when setting the hydraulic breaker relief valve.
1) Refer to page 66; 7 – 3. How to measure the P – Q Following points 1) – 3)
2) Start up the engine, position the throttle lever or dial to the MAX.position and Press down on the
operating pedal. The pressure indicated on the pressure gauge is the backpressure for the piping
(resistance).
Pressure gauge
1087 1450 1595 1740
63.1 62.1 61
have been made, re-measure the P x Q. If the flow can be obtained, the TNB-151LU can be
mounted to this machine.
piping circuit and the filter for any abnormalities.
energy may lack in performance.
1885 2030 2175 2320
60 59.4 58.6 57.8
Open handle fully
at first.
69
2465 2610 2755
57.1 55.8 54.7 48.9
Boom
Press the pedal
2900 3045
21.3 0
Relief
valve