Elkhart Brass 299-20XHC-N7/4 Monitor - Manual (Page 4)

Revised 8/20/2010 4 EB98175000_Rev. B
3.3.6 Disconnect hydraulic lines from horizontal actuator ports V2A & V2B. Open port
control valves at both ends of rotary actuator, turn screws counterclockwise until they
stop. (See illustrations 1 & 4 for location). Manually turn monitor to maximum
horizontal clockwise position.
3.3.7 Insert open end of V2A hydraulic hose into clean container, and activate “LEFT”
mode switch at control box. Hold switch until hydraulic fluid is discharging from
hose and is free of air. Reconnect hydraulic hose to actuator port V2A, then activate
“LEFT” switch until monitor reaches maximum counterclockwise position.
3.3.8
Insert open end of V2B hydraulic hose into clean container, and activate “RIGHT”
mode switch at control box. Hold switch until hydraulic fluid is discharging from
hose and is free of air. Reconnect hydraulic hose to actuator port V2B, then activate
“RIGHT” switch until monitor is moved to maximum clockwise position.
3.3.9 Reposition monitor so nozzle hydraulic line connections are easily accessible.
Disconnect hydraulic lines V3A & V3B from nozzle ports. Open needle valve on
nozzle (see illustration 2) to full counterclockwise position. Then manually push
nozzle tip to full fog position Insert open end of V3A hydraulic hose into clean
container and activate “STRT” switch at control box. Hold switch until fluid is
discharging from hose and is free of air. Reconnect hydraulic hose to nozzle port V3A
and activate “STRT” switch until nozzle reaches the straight stream position.
3.3.10 Insert open end of V3B hydraulic hose into clean container and activate “FOG”
switch at control box. Hold switch until fluid is discharging from hose and is free of
air. Reconnect hydraulic hose to nozzle port V3B and activate “FOG” switch until
nozzle reaches the maximum fog position. Lower monitor to approximately 45º
below horizontal and move from fog to straight stream positions several times
allowing about one minute idle time at each end of stroke, this will remove any
remaining air bubbles in nozzle cylinder.
3.4 Hydraulic pump pressure adjustment procedure:
3.4.1 Check hydraulic fluid levels in reservoir, if low add fluid.
3.4.2
Activate and hold “FOG” function switch, this will start hydraulic pump and move tip
to fog position. Hold switch in fog position and check pressure on gauge located in
valve & pump box.
3.4.3 Open adjustable relief valve until pressure reads 1000 PSI, and then tighten down lock
nut on relief valve screw. Turn relief valve screw clockwise to increase pressure and
c’clockwise to decrease pressure.
3.5 Adjusting speed of monitor and nozzle:
3.5.1 Port control valves are located at each end of the monitor rotary actuators and needle
valve is plumbed into hydraulic line of piston on nozzle. (See illustrations on page 5).
3.5.2 Horizontal movement should operate at proper speed with port control valves at full
open (c’clockwise) position.
3.5.3 To adjust vertical speed of monitor, open port control valves completely at both ends of
actuator. Turn screw counterclockwise.
3.5.4 Raise nozzle to full up vertical position. With nozzle in fully up position close port
control valve, turning in clockwise direction slowly until desired speed in downward
movement is reached and nozzle lowers at a steady rate. Turn port control valve screw in
c’clockwise direction to increase speed.
3.5.5 If monitor starts to jerk when moving downward, raise nozzle to the full vertical
position. While lowering nozzle, turn port control screw for down movement (see
Illustration 3) clockwise slowly until nozzle lowers smoothly. By doing this
removes
backpressure on
pilot check valve and allows valve to stay open while monitor is
moving to the down position.