Question about Hitachi 3/4", Variable Speed Reservible, Hammer Drill, 2 Mode

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Brand new Hiyachi DH24PC3 leaking oil from chuck on first use while using hammer only chisel application - is this due to overheating ?

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Hi, these impact drills need greese to function properly and some modles leek more than others. As its new you could ask for a new seal, as this is what is allowing the oil to leek. Hope this helps

Posted on Jul 12, 2010

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Posted on Jan 02, 2017

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1 Answer

Oil discharge around chuck when i use the chisel function


It is totally normal if some oil came out the chuck because the grease due to the high heat becomes oil and came out from the chuck. It depends on the quantity it comes out. If it is a huge quantity then replace the grease.

Aug 25, 2015 | Dewalt Drills

1 Answer

How do i fix oil leak in seals of jackhammer


by a service kit that are made for your model

I do you a suggestion how you can do it yourself if you have a burner to heat up the bolts because of loctite sealant i think you know something of forces on that parts ? because of the tools that are neccesary to service it .
Here is a suggestion of a brand that is maybe there or coming in your Country . thats why i do this suggestion by a dutch link .
https://devs.hitachi-koki.co.jp/ois/explodedDiagram.html?type=svg&modelName=H+90SE&newwindow=true

If you know the brand of your hammer ? sometimes bought secondhand and no modelname google it on 3 words powertools the brand service or choose pictures if you will see pictures where you can see your hammer but there are can be marketing technical differences by the models because a suggestion i made by Hitachi the H90 and H90SE are not compatible by service kit a part of spares can only be used.
The time you spend is meaningless if you only think its leaking oil. because there is a thin lubrication inside most jackhammers and if that's leaking ,the working hours are on it, for time wasted re prematurely burned grommets make high-priority work bolt seal the front of the machine at the stroke chisel the first rings oil seals as well as the size of the stroke bolt must be tight and smooth, as if only a little air leaks burned den all your new o-rings (ie be hard in the short term) by overheating, use lubricants, not just fat because of the high temperature internal structure and the thermal conductivity of the parts together.

Jan 13, 2015 | Hammering

1 Answer

Do all sds drills have chisel function?


The SDS designation relates more to the type of chuck on the tool for the bits than to the tool/drill itself. There are both chisels and drill bits with SDS-Plus and SDS-Max shanks, SDS-Max being the the larger of the two. As far as the tools go: Demolition hammers will only hammer and can only use pointed chisels, scaling chisels, scrapers, etc, not anything like a drill bit that requires spinning to work. Rotary hammers can hammer and rotate the bits. Rotary hammers have a selector switch with two or three positions; one for hammer only for the above demolition bits, one for rotary hammer for use with carbite tipped drill bits, and some have a position for rotation only. The rotary hammer is a more versitile tool but more expensive because of extra workings inside.

Feb 17, 2011 | Garden

1 Answer

I have a HILTI TE905 breaker and something is seems wrong with the chuck or the chilsal as it keeps falling out of the end and not gripping it. Is it possible to take the chuck apart to see if I can spot...


I have just dismantled my own TE 905 to see why it was dropping the chisels and have found the following:-

1. The chisel is worn and has almost become too small for the chuck. (mesure the thickness of the chisel at both ends of the hexagonal shaft and see the difference)

2. The chuck is worn and will probably need to be replaced.
I phoned Hilti today and was quoted £100 for ONE PART OF THE CHUCK!!!

a. The chuck as a whole can easily be removed by undoing the four torx screws that hold the chuck on to the main body.

b. The chuck can be dismantled by removing the retaining ring that holds the metal outer case in place at the front of the chuck. This is very fiddly and requires some engineering skill, the use of pointed instruments could easily result in injury.

The third fix is the one I am going to use to 'patch up' my old breaker. This involves welding some small amounts of dissimilar weld onto the points of the hexagonal section at the rear of the chisel then grinding them to near enough the original size of the un-damaged section of the chisel.
This will very crudely stop the chisel from passing the ball bearings inside the chuck. PLEASE NOTE THAT ANY HEAT APPLIED TO THE CHISEL WILL CAUSE STRESS AND POSSIBLE FAILURE OF THE CHISEL. ANY MODIFICATIONS OF THIS NATURE COULD RESULT IN INJURY TO PERSONS WORKING AROUND YOU AND ARE NOT RECOMMENDED IF YOU ARE WORKING AT HEIGHT OR WITH PEOPLE BELOW YOU. This is a fix that should only be attempted by competent engineers for use on a DIY or small job basis. Hope this helps.

Oct 05, 2010 | Hilti Hammer Drill Bit, Te Yx 5/8 In. X 13...

1 Answer

How to disassemble a te 60 , the chuck end. Its not worth sending to factory but i might tackle it myself it does not hammer all the time and does not rotate all the time


Hilti no longer services the old TE60. If yours is a metal housing here is how you disassenble the front end.First you need to put a flat bladed chisel in the chuck. Then lock the chisel in a vise. Next you put a pipe wrench on the chuck cap nut. That is the piece on the end of the chuck. Using a cheater bar turn the nut off counter clock wise. You then can remove your chisel, the cap nut, an oring and the locking sleeve with two rollers. This will expose the chuck that is held in place with 8 5mm allen screws. After that you have a large snap ring to remove before pulling out the rest of the front end assy.

Jul 18, 2010 | Hilti Hammer Drill Bit, Te Yx 5/8 In. X 13...

2 Answers

The chuck on my old Hilti TE 60 is stripped.


Are you talking about the cap nut that threads onto the chuck? It is very rare that it would strip out. Word of warning if you do find one and thread it back on. You need to have a chisel in the chuck and have the chisel end locked in a vise. This protects from breaking the gear housing on the inside where the shift dog rides up and down.

Those parts are no longer available but you can still find some used on Ebay. Also the TE-72 used the same chuck parts.

Apr 27, 2010 | Hilti Hammer Drill Bit, Te Yx 5/8 In. X 13...

2 Answers

How do you change out the chisel on the Hilti TE 76P?


Pull back on the chuck head and turn it. The Chisle should fall out.

Oct 25, 2009 | Hilti TE 7-C 120V Rotary Hammer Drill

1 Answer

Chuck is locked open


you have three jaws in your chuck, one of them will probably have a small burr on it causing it to stick.

try this...

tap the chuck with a small hammer then try to use the chuck key gently in the opposite key hole to the hammer blows. turn chuck though 120degrees and repeat.

if this does not work chucks are fairly universal and easily replaced (i would recommend a keyless jacobs). you can get the old one off by removing the ph2 (phillips) machine screw inside the centre of the chuck... be careful!! this screw is usually soft and counter threaded... when screw removed bash off the chuck with a hammer and cold chisel...

good luck

Oct 23, 2009 | Dewalt 1/2 Hammer Drill DW511

3 Answers

Hilti te-72 hammer failure


Do not put it in hammer mode and try to unscrew the chuck! This will break the housing internally. To remove the chuck you will have to put a chisel in the chuck. Lock that chisel in a big vice. You will then have to put a pipe wrench on the chuck to unscrew it. It is regular threads but there will be loctite on it. Once that is off your will have a spring and two roller bearings to remove before you can slide the bell off. You will then have 8 5MM screws to remove. This will remove the chuck. You will then have a snap ring to remove. After that you can remove the whole cylinder assy. More then likely your connecting rod is broken.

Jul 20, 2009 | Hilti TE 7-C 120V Rotary Hammer Drill

3 Answers

Hammer drills and rotary hammers comparison


Basically yes. Lower power units are usually titled as "hammer drills." Higher power units, usually labeled "rotary hammers," tend to be larger and provide bigger impact forces. But there are a few differences that are worth knowing: The rotary hammer usually have a chisel only feature, for light chiseling and masonry removal. Rotary hammers also have specially designed chucks that only accept bits specifically designed to fit their chuck. The special chuck on a rotary hammer helps hold the drill bit and prevents it from slipping during use.

Aug 27, 2008 | Irwin SDS-Plus Hammer Drill Bit 6in.L,...

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