Main Characteristics; Running-In - Komatsu PC27R-8 Operation & Maintenance Manual

1.3.3 MAIN CHARACTERISTICS

Simple and easy operation
Hydrostatic transmission obtained through two axial piston motors that operate epicyclic reduction gears.
Upper structure rotation achieved through an orbital hydraulic motor (for PC20R only).
Upper structure rotation achieved through an axial piston hydraulic motor acting on an epicyclic reduction gear
(for PC27R only)
Main equipment servolevers ensuring also combined movements that can be modulated proportionally and
continually.
Pedal controls for the boom swing and the optional equipment.
Lever controls for travel and blade.
Travel speed increase achieved through a pedal-operated push button.
Complete series of instruments visible from the operating position.
Lever accelerator.
Easy maintenance with simplified intervals.

1.3.4 RUNNING-IN

Every machine is scrupulously adjusted and tested before delivery.
A new machine, however, must be used carefully for the first 100 hours, in order to ensure proper running-in of
the various components.
If the machine is subjected to excessive work load at the beginning of operation, its potential yield and its func-
tionality will be shortly and untimely reduced.
Every new machine must be used carefully, paying special attention to the following indications:
After the start, let the engine idle for 5 minutes, in such a way as to warm it up gradually before actual opera-
tion.
Avoid operating the machine with the limit loads allowed or at high speed.
Avoid abrupt starts or accelerations, useless sudden decelerations and abrupt reversals.
After the first 250 hours, carry out the following operations, in addition to those to be performed every 250
hours:
1 - Change the oil in the travel reduction gears.
2 - Check and adjust the engine valve clearance.
SYNTHETIC BIODEGRADABLE OIL TYPE HEES
On machines in which the synthetic biodegradable oil type HEES is used, the following operations are to be per-
formed besides the standard maintenance operations:
After the first 50 hours of operation, change the hydraulic circuit drain filter.
After the first 500 hours of operation, change the hydraulic circuit oil.
IMPORTANT
When changing the oil filters (cartridges), check their inner part to make sure that there are no depos-
its.
If considerable deposits are observed, find out what may have caused them before starting the ma-
chine.
The number of operating hours is indicated by the hour meter.
INTRODUCTION
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