G-Force GFQ4000 QL40 Shank

G-Force QL40 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 G4001
2 Back Head O-Ring G4002
3 Choke  
4 Air Check Valve G4004
5 Air Check Valve Spring G4005
6 Make-Up Rubber (Buffering) G4006
7 Air Guide G4007
8 Air Distributor G4008
9 Air Distributor O-Ring G4009
10 Cylinder G4010
11 Cylinder Stop Ring G4011
12 Wear Sleeve G4QL4012
13 Piston G4QL4013
14 Piston Stop Ring G4QL4014
15 Bit Bearing O-Ring G4QL4015
16 Bit Bearing G4QL4016
17 Bit Retaining O-Ring G4QL4017
18 Bit Retaining Ring G4QL4018
19 Chuck (Drive Sub) G4QL4019
  Choke Plug Kit G4029
  O-Ring Kit G4030

Specifications


Length (w/o drill bit) 40.55"
Outside Diameter 3.858"
Weight (w/o bit) 82.9 lbs.
Cylinder Bore 3.229"
Piston O.D. 3.224"
Piston Stroke 3.74"
Piston Weight 20.3 lbs.
Hole Sizes 4" - 6"
Air Pressure Consumption 100 psi - 350 psi
Wrench Size A/F 3.15"
Connection Std. 2 7/8" API Reg Pin

Air Consumption Chart


PSI 150 200 250 300 350 400
CFM with blank choke 240 340 440 540 - -
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 3.228" greater than or equal to 0.010"
Piston OD B 3.224"
Wear Sleeve / Piston Clearance diagram

Inner Cylinder / Piston Clearance

Part New Dimension Discard Clearance
Cylinder ID C 2.756" greater than or equal to 0.010"
Piston OD D 2.752"
Inner Cylinder / Piston Clearance diagram

Distributor Probe / Piston ID Clearance

Part New Dimension Discard Clearance
Distributor Probe OD F 0.978" greater than or equal to 0.010"
Piston ID E 0.984"
Distributor Probe / Piston ID Clearance diagram

External Wear

Description Wear Limit
Wear Sleeve Discard Dimension 3.425"
NOTE: 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 - 500 lbs. Maximum @ 350 psi - 1800 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.