G-Force GFQ8000 QL80 Shank

G-Force QL80 diagram

Features:
  • Easy to service
  • Special heat-treated alloy piston for long life, Rockwell hardness 60
  • Minimum loss of performance when injecting foam or water

Item # Description Part #
1 Back Head G8001
2 Back Head O-Ring G8002
3 Choke  
4 Air Check Valve G8004
5 Air Check Valve Spring G8005
6 Make-Up Rubber (Buffering) G8006
7 Air Guide G8007
8 Air Distributor G8008
9 Air Distributor O-Ring G8009
10 Cylinder G8010
11 Cylinder Stop Ring G8011
12 Wear Sleeve G8QL8012
13 Piston G8QL8013
14 Piston Stop Ring G8QL8014
15 Bit Bearing O-Ring G8QL8015
16 Bit Bearing G8QL8016
17 Bit Retaining O-Ring G8QL8017
18 Bit Retaining Ring G8QL8018
19 Chuck (Drive Sub) G8QL8019
  Choke Plug Kit G8029
  O-Ring Kit G8030

Specifications


Length (w/o drill bit) 53.5"
Outside Diameter 7.08"
Weight (w/o bit) 366.7 lbs.
Cylinder Bore 5.984"
Piston O.D. 5.98"
Piston Stroke 4.13"
Piston Weight 95.8 lbs.
Hole Sizes 7 7/8" - 10"
Air Pressure Consumption 100 psi - 350 psi
Wrench Size A/F 5.512"
Connection Std. 4 1/2" API Reg Pin

Air Consumption Chart


PSI 150 200 250 300 350 400
CFM with blank choke 450 530 850 1,080 1,320 1,500
with 1/8" choke 375 595 760 925 1,060 1,205
with 1/4" choke 425 665 845 1,095 1,270 1,350

All Hammers come Fitted with blank Choke located in the Air Check Valve




Hammer Service Log


Wear Sleeve / Piston Clearance

Part New Dimension Discard Clearance
Wear Sleeve A 5.984" greater than or equal to 0.010"
Piston OD B 5.98"
Wear Sleeve / Piston Clearance diagram

Inner Cylinder / Piston Clearance

Part New Dimension Discard Clearance
Cylinder ID C 5.197" greater than or equal to 0.010"
Piston OD D 5.192"
Inner Cylinder / Piston Clearance diagram

Distributor Probe / Piston ID Clearance

Part New Dimension Discard Clearance
Distributor Probe OD F 1.803" greater than or equal to 0.010"
Piston ID E 1.811"
Distributor Probe / Piston ID Clearance diagram

External Wear

Description Wear Limit
Wear Sleeve Reverse Dimension 6.811"
Wear Sleeve Discard Dimension 6.693"
NOTE:
  1. If no evidence of significant air pressure drop or if wear sleeve is wearing evenly on the top and bottom end, recommendation is to not reverse wear sleeve.
  2. Chuck should be replaced when wear transfers to wear sleeve.


Lubrication

G-Force Series Hammers are precision-made tools and should be treated as such. Only the highest quality lubrication should be used and a constant flow of oil must be maintained at all times. Recommended lubrication amount 1/3 Pint per 100 cfm per hour.

Recommended Grades of Lubricant

ESSO
MATEX
CASTROL
SHELL
MOBILE
AROX EP 150
RDO 302
RD OIL DP 100
AIR TOOL OIL 2 A 320
ALMO NO. 5
Heavy duty oil is recommended for all year-round use, in particular where air supply to the hammer is at high temperature. If lighter grade oil is required due to very low ambient temperatures, amount of oil being used should be increased by 30 percent.

Recommended Pull Down

Minimum @ 100 psi - 2500 lbs. Maximum @ 350 psi - 6500 lbs.

Missile Warranty will be voided by the following:


Welding on Wear Sleeve.
Heating Case with a Torch.
Gripping Wrenches across Threads.
Hammering on Casing.

READ WARNING LABEL ATTACHED TO HAMMER.