Hunter G835 - Nozzle Replacement - G90 Risers

nozzle RePlACeMenT
–
g90 RiSeRS
To view and replace the nozzles, it is necessary to compress the riser spring by grabbing the riser seal assembly
(g 37), pressing downward and then holding riser rmly to prevent the spring from moving upwards.
The G90 riser has three color-coded opposing nozzles. All G90 nozzles are retained in the nozzle housing (turret) with
three setscrews (gs 38 & 39). Each setscrew has a
3
⁄32 inch Allen recess at the top. Insert the metal end of the Hunter
wrench or a
3
⁄32 inch wrench into setscrew that is above the nozzle to be replaced. Engage the setscrew and turn
counter-clockwise until the bottom of the setscrew clears the top of the nozzle.
To remove the long-range primary nozzle, rst note the nozzle’s orientation prior to removal. The G90’s primary nozzle
has a protruding rail that must engage the slot on the right side of the nozzle opening. Understanding this will help
during the installation process later. Using needle-nose pliers, grab the nozzle’s outer ring next to the recess on the
right side of the nozzle opening and then pull outward. If necessary, grab the nozzle’s orice to gain a better grip.
Discard the old nozzle as the removal process can damage the nozzle and negatively affect the performance.
Insert the replacement nozzle into the nozzle housing. Press rmly until the nozzle stops. Turn the nozzle-retaining
setscrew clockwise while making sure that the setscrew does not distort the nozzle. Lower the setscrew in front of
the nozzle only as far as necessary to prevent nozzle movement. Take care not to position the setscrew in front of or
against the nozzle’s orice as performance can be negatively affected.
If the nozzle size or color has been changed, please note that the adjustable stator will likely need to be reset. Refer
to the Stator Adjustment section in this manual for information on how to reset the stator.
The G90’s short-range and mid-range nozzles are performance matched to all G90 long-range nozzles. As a result,
replacement of these nozzles is normally required only when a nozzle has been damaged. If replacement does
become necessary, it is important to note that these nozzles must be installed in the correct orientation for optimal
performance.
Prior to removal of the G90’s short-range or mid-range nozzle, note the differences between the nozzle on the left
and right.
 • G90FullCircle-Theshort-rangenozzleisblackandontheleftside.(g39)
- The mid-range nozzle is blue and on the right side. (g 39)
Note - In late 2010, the short-range nozzle will change to red.
Using needle-nose pliers, grab the nozzle’s orice then pull outward. Discard the old nozzle as the removal process
will damage the nozzle and negatively affect the performance. Insert the replacement nozzle into the nozzle housing
and press rmly until it stops. Turn the nozzle-retaining setscrew clockwise to a position in front of the nozzle that
prevents nozzle movement. Take care not to position the setscrew in front of or against the nozzle’s orice as
performance can be negatively affected.
FIG 37 FIG 38 FIG 39


Fig 37



Fig 38
Fig 39



Fig 38
Fig 39
14