Great Plains P16229C Operator Manual - Manual (Page 24)

Hydraulic Reset Flatliner
Operating Instructions
24
5 . 7 . 1 Va l v e S e t t i n g
Sequence - Factory Setting
(Read in conjuction with page
80)
1. Raise machine, to ensure tines are fully
clear of the ground at depth.
2. Adjust reliefs ( REF. X), (REF. T) and
precharge valve ( REF. Z) all clockwise
fully.
3. Adjust flow control ( REF. Y) fully
clockwise, then anti-clockwise 2 turns.
4. Raise tines, then pressure fully down.
Set failsafe ( REF. T) to between
190-220 bar. If available pressure is
insufficient to achieve this, set to ½
turn clockwise above that where valve
relieves at tractor maximum pressure.
If tines do not relieve under severe
overload, this valve should be
reduced (anti-clockwise) until this
occurs in work, otherwise damage
may occur.
5. Pressure tines down, and set
accumulator relief ( REF. X) to 90 bar
as tines are lowered.
6. Adjust precharge valve ( REF. Z) 1/8
turn anti clockwise.
7. Pressure tines down and check
cylinder pressure reads 90 bar and
the corresponding rod pressure reads
between 20-40 bar (achieved by
adjusting precharge valve ( REF. Z)).
8. Put main circuit in float, check above
pressures are maintained at least at
the lower values indicated.
5.7.2 Valve Adjustment - To
Suit Field Conditions (Read
in conjuction with page 80)
(a) Normal / Stony conditions
To avoid damage to tines and chassis in
severe stone conditions reduce accumulator
relief ( REF. X) as tines are held in ‘lower’ to
read 90 bar.
(b) Hard, stone free conditions
It is permissible to increase gauge pressure
for accumulator relief ( REF. X) as tines are
held in ‘lower’ to read up to 120 bar with a
cylinder pressure between 40-60 bar rod
pressure for working in hard, stone free
conditions.
5. Servicing and Maintenance