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IV CORE

UPGRADE KIT

ADVANCED IV CORE INFORMATION:

The IV Core Bolt and Can can be maintained in exactly the same way the Can and 

Bolt depicted in your GEO User Manual.
However, the Propshaft may require some further maintenance that is not covered 

in your User Manual.

ADVANCED BOLT SYSTEM 

MAINTENANCE 

This procedure is only required if you are maintaining 

the rear section of the propshaft assembly due 

to a leak coming from the front of the bolt. After 

maintaining the front 14x2 propshaft o-ring and 017 

internal can o-ring.
Firstly remove the bolt system assembly, then 

separate the bolt can and propshaft assemblies as 

detailed on pages 48-49 of the GEO 3.5 manual.
Go to 

planeteclipse.com

 for the latest versions of our 

manuals and instructions, for reference.
Push down on the split in the delrin retaining ring and 

pull the retaining ring out of the propshaft back cap 

(see figure 20A)

Remove the propshaft from the back cap, taking care 

not to lose the propshaft spring, plunger or plunger 

o-ring. 
Check the 14x2 o-ring at the back of the propshaft, 

and clean or replace then re-lubricate with Eclipse 

Grease as necessary. Check the rear bumper for 

signs of wear, replace as necessary 

(see figure  20B)

Place the spring within the propshaft 

(see figure 20C)

.

Replace the back cap over the rear of the propshaft, 

pushing the propshaft back into the back cap 

(see figure  20D)

1

.

Compress the retaining ring 

(see figure 20E)

 and 

push the retaining ring into the back cap. The 

retaining ring needs to sit in its designated groove in 

the back cap. If the propshaft can be pulled out of 

the back cap then the retaining ring has not seated 

correctly.

1  If any o-rings or the bumper are damaged then replace them. 

Extra o-rings and bumpers are available in parts kits available 

at www.planeteclipse.com.

WARNING!

Always de-gas your 

marker, discharging 

any stored gas in a safe 

direction, and remove the 

barrel, loader, air system 

and any paintballs to make 

the marker easier and 

safer to work on.

IMPORTANT!

Your GEO MUST be chronographed before use!!

FIG 20A

FIG 20C

FIG 20E

FIG 20B

FIG 20D

MAN0016-V2

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