Grove toucan 1010, Service Manual

Page: 23 / 73

23
Models
Revision 02-2000
Toucan 1010
3.3.6. Jib lowering (PR6)
1- Connect the pressure gauge to the pressure
test plug at port "M" on FUNCTION
MANIFOLD.
2- Perform a JIB LOWERING function until the
jib cylinder reaches the end of its course. Note
the maximum reading of the pressure gauge.
If the reading is not within ± 5 bar of the relief
pressure shown in the table titled
Relief Valve
Pressure Settings , adjust the pressure setting
as necessary.
3- Remove the pressure gauge.
3.3.7. Brake release maximum pressure
(PR7)
1- Chock both front wheels as indicated below :
2- Disconnect and cap the hydraulic lines to the
brakes.
3- Connect the pressure gauge to the pressure
test plug at port «M» on BRAKE MANIFOLD.
4- TURN FULLY IN the PR7 relief valve adjustment
screw.
5- Position the DRIVE SPEED SELECTOR switch
to HIGH ( ) speed.
6- Activate a DRIVE FORWARD function by
pushing the controller forward (away from the
operator). The maximum reading on the
pressure gauge must be between 15 and 21
bar corresponding to the pressure reducer
setting. Note the exact reading on the pressure
gauge.
If the pressure reading is lower than 15 bar
or higher than 21 bar, consult your local
Grove Manlift distributor for servicing.
7- TURN OUT the PR7 relief valve adjustment
screw until the pressure drops just under the
previously recorded value, then turn the
adjustment screw 1/4 turn IN.
8- Unhook the pump handle and push the brake
release lever towards the chassis to BRAKE
UNLOCKED position ( ). Refer to the Towing
procedure in the Operator's and Safety
handbook.
! CAUTION
(
P
)
9- Insert the handle in the hand pump and activate
the handle energetically. Note the peak
pressure on the pressure gauge. If the peak-
pressure exceeds 35 bars, turn out the PR7
relief valve adjustment screw 1/8 turn and
check the peak pressure again.
10- Remove the pressure gauge.
11- Connect the hydraulic lines to the brakes.
Brakes maximum working pressure = 30 bar.
Maximum admissible peak-pressure when
using the hand pump to release the brakes =
35 bar.
3.3.8 Drive at low speed (PR8)
1- Chock both wheels as indicated below :
2- Connect the pressure gauge to the pressure
test plug at port "M" on FUNCTION
MANIFOLD.
3- Position the DRIVE SPEED SELECTOR switch
to LOW ( ) speed.
4- Activate a DRIVE FORWARD function by
FULLY pushing the controller forward (away
from the operator). Note the maximum reading
on the pressure gauge. If the reading is not
within 0/-5 bar of the relief pressure shown in
the table titled
Relief Valve Pressure Settings ,
adjust the pressure setting as necessary.
5- Remove the pressure gauge.
! CAUTION
PRESSURE SETTINGS 3 3