Takeuchi TB 250, Workshop Manual

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PERFORMANCE CRITERIA
SERVICE DATA
Swing cylinder speed
• Engine: Maximum R. P. M.
• Hydraulic oil temp.: 50~60°C
• Measurement posture: Same as that for measuring slew
time.
• While swinging the boom left (right) to right (left), mea-
sure the time required for a full stroke each way.
(Do not include the cushioning time.)
Natural cylinder drop
Boom, arm, bucket, dozer blade, bucket tip
• Engine: Maximum R. P. M.
• Hydraulic oil temp.: 50~60°C
• Measurement posture: Completely retract the dozer
blade and arm cylinders, fully extend the bucket cylinder
and adjust the bucket pin position to the same height as
the boom foot pin.
• Maintain this position for 10 minutes, then measure the
change in rod length and the distance the bucket tip
falls.
Swing cylinder
• Engine: Stopped
• Hydraulic oil temp.: 50~60˚C
• Gradient: 15˚
• Measurement Posture: Same as that for measuring slew
time.
• Rotate the upper machinery so that it is directly abeam
of the grade, then measure the change in rod length
after 5 minutes.
Lever Operating Force
• With the engine stopped, attach a push-pull scale to the
center of the operation lever’s handle grip, or in the case
of a pedal, position a push-pull scale to its tip and record
the measurement at the point the lever/pedal reaches
full stroke.