Yt27 Pneumatic Rock Drill with Air-Leg Technology

• Application: Pneumatic Breakers
• Condition: New
• Color: Any Color
• Transport Package: Carton
• Specification: 27kg
• Origin: China
• Model NO.: YT27

Product Description

YT27 Air-leg Rock Drill
,Instruction
The rock drill is a kind of high efficiency air leg rock drill machine. It is mainly used for blasting holes and other drilling works in a quarries, railway construction, water conservancy construction and national defence project facility.
When it is matched with Model FY250 Oil reservoir and Model FT160A or FT160B Air-leg , it is suitable for wet drilling under various of rocks at aclinic and incline orientation, it can also use in the trolley without Air-leg.

,Specification
Weight                                                      27 kg
Outside dimension(L×W×H)                         668×248×202mm
Cylinder dia                                                 80mm
Piston stroke                                                60mm
Impact energy                                             ≥75.5J
Impact frequencey                                        ≥ 36.7Hz
Air consumption                                        ≤83.3L/S
Air pipe (inner dia)                                           25mm
Water pipe (inner dia)                                       13mm
Air pressure                                               0.63MPa
Water pressure                                             0.3MPa
Bore dia                                                 34-45mm
Bore depth                                                    5m
Shank dimensions(hex×length)                     22×108±mm×mm

Model FY250B oil lubircator
Weight                                                      1.2kg
Oil capacity                                                  0.25L
Air leg                       FT160A                      FT160B
Weight                           17kg                       16 kg
Llength: max                    3006mm                    2526mm
min                           1668mm                    1428mm
Propulsion stroke                1338mm                    1098 mm
Axis thrust (max)                 2000N                       2000N
,Maintenance
,Notice
1,Dismantling new machines and clean the parts, dispose of antirust grease before using it. The parts of exterior must be lubricate when relocate, then operate and check machine about 10minutes and is low air pressure (0.3Mpa) before using it.
2,The air pressure should be kept at 0.5-0.63 MPa.(measure in rubber tube), if the air pressure is too high, it will damage parts fast. And if the air pressure is too low, it will affect the speed of drilling and the machine is also normal working.
3,Before using machine, blow off dirty to protect parts. inspect the screw thread whether is tight and the operator handle whether is free to move, ensure machine operate normally .
4,The lubricating oil into oil reservoir before using machine and mix up the accelerograph. and do not operate machine without lubricating oil.
5,Before using machine, increase holding power, while operate machine increasingly. Do not operate machine at the max thrust or should not idle machine for a long time, it will damage parts.
6,Dismantling water pipe and operate machine after blasting holes. It can blow off the rest moisture and protect the parts away from rusting .
7,The rock drill is centre water-injection drilling. Do not operate without water and dismantle water needle. If dismantle the water needle ,the machine will not operate.
8,Tighten two side bolt nuts to protect parts and tighten air pipe to aviod hurt.
9,If machine should store for a long time. Diamantle machine first, oil and seal them, then put it in a dry place.
,Lubricating oil
Lubrication has great influence in the performance and working life. Do not operate machine without lubricating oil, it is better that not use grease lubrication avoid to obstruct pipeline, reduce machine efficiency and acceleration element wear. In different season has different oil.

Temperature	Name	NO.	Kinematic viscosity	Solidifying point	Standard
-30--10	Refrigerator oil		11.5-14.5(50ºC)	-40ºC	ZBE34003-86
-10-0ºC	Turbine oil	N22	20-23(50ºC)	-10ºC	GB2537-81
0-30ºC	Cylider oil (30%) Machine oil (70%)	HG-24+HJ-50	20-28(100ºC) 47-53(50ºC)	15ºC -10ºC	GB447-77 GB443-84

• Safety

1,Ensure that technical safe practices are employed.
2,Pay attention to the position of steel wire ring clamp, if found it fray,change it.
3,Check steel wire ring clamp whether or not abrase, if so, change another at once.
4,Do not allow use low burning point and easy explosion lubricating oil.
,Malfunction and solution

Malfunction	Cause	Solution
Speed depress	Low air pressure	If pipeline is over-burden, reduce the operating machines
		check air pipe dia and valve switch whether too small, if so ,change it.
		If air pipe is too long ,cut short
	lack of Air-leg thrust	Enlarge the angle between air-leg and floor
		If Seal ring is abrased, change it
		Trigger or change-over valve can't move, mend it at once
	Water intake	Water pressure is higher than air pressure, water flow into cylinder, damage usual lubrication. Play down the water pressure immediately
		Water injection system out of work ,water and air run into machine, check it at once
	Muffler icing	Thaw out
	Bad lubricate	No  lubricating oil, oil it
		Block oil hose , clean and blow off dirty
		If the oil so dirty, use standard oil chang it
	Water flow out from front head.damage normal lubrication	If water tube is broken, change it
		If drill hose is blocked or too small, change it
		Water tube dia ≤3mm
	Main parts abrase	If cylinder and piston surface abrase, rubdown it with oilstone
		If distributing air valve abrase, change it
		If piston, nut, rotational sleeve and other parts damage, change it
Difficult to operate	Dismantle water tube	Assemble it
	Lubricating too much	Adjust it
	Water intake	Find out trouble and resolve
Water tube broken	The center aperture of Piston damage or Shank is wrong	Change piston or drill
	Clearance is too large between shank and drill sleeve	Hex size of shank sleeve is abrase over 25mmm,change another one
	Water tube is too long	Adjust water tube length
	Shank hose is too low	As draw specification process it
Out of use	Water pressure is too high	Play down water pressure (≤0.1Mpa)
	Block hose	Drill through the hose
	Parts rust	Clean and remove rust
	Spring out of use	Change it
	Rubber ring damage	Change it
Drill broken	Air pressure is too high	Play down air pressure
	Operate machine immediately	Operate it increasingly
	Drill is flex	Change it
	Angle is too small	As draw process shank
	Heat treating trail	Improve process