Miller GP25 Parts list manual

1242 ARIZONA AVE.
LARCHWOOD, IA 51241
1-800-570-8205
GP25 LOADER
PARTS and INSTRUCTIONS
OWNER’S MANUAL

TO PREVENT POSSIBLE ROLLOVER, OBSERVE THE FOLLOWING
SAFETY PRECAUTIONS
♦ Carry loads as low as possible
♦ Drive tractor slowly when turning, operating on hills or inclines, or traversing un-
even ground
♦ Raise load to full height only when tractor in on even ground and front wheels
are straight ahead
TO PREVENT POSSIBLE PERSONAL INJURY, OBSERVE THE FOLLOW-
ING SAFETY PRECAUTIONS
♦ Never walk or work under a raised loader that is not firmly supported
♦ Always relieve the hydraulic system to zero pressure before performing repairs on
any component of the loader’s hydraulic system
DANGER

TABLE OF CONTENTS
• Composite Bearing Information
• Mounting Loader on Tractor
• Dismounting Loader
• Quick-attach Instructions
• Parts Schematics
• Cylinder Packing Detail
• Loader Specifications
• Warranty
SERIAL No. of Loader Purchased _______________________
Date Purchased____________________

COMPOSITE BEARING INFORMATION
FIGURE A. Your GP/GL-Series loader is equipped
with composite, greaseless bearings at all (12) pivot
points. These high-quality bearings should not be
confused with plastic bushings, sintered bushings, or
metal-backed bearings. Composite bearings are
made from an ultra-strong fiberglass composite that
has twice the compressive yield strength of plain
carbon steel. Their greaseless feature is due to a
Teflon-impregnated liner that is interwoven to the
bearing’s inside diameter. The bearings are de-
signed to last the life of the loader and the pins that
rotate in the bearings should exhibit practically no
wear.
FIG. A FIG. B
Pin Seal
Pin Seal
Bearing
FIGURE B. Even though the composite bearings on
your GP/GL-Series loader have excellent resistance to
dirt particles, the (4) pivot points on the bucket have
an added feature. The two lower bucket cylinder piv-
ots and the two mainframe-to-bucket pivots are
equipped with pin seals on each end of the bearing
housing. It is these four pivot points that are usually
down in the dirt and grime, but with a GP/GL-Series
loader, you won’t have to worry about pin failures
again!
Bearing
Housing
FIGURE C. Should any of your bearings have to be re-
moved, this photo shows the tool that is available to remove
and install the bearings properly. They are available for pur-
chase, you just need to tell your dealer or Miller Loaders the
model of loader you have. If you’d prefer to make your own,
here are a few things to remember:
• The nose should be 1/4” longer than the bearing
• A 1/4” bevel on the end of the nose
• The shoulder must be just slightly smaller than the out-
side diameter of the bearing
• The diameter of the nose should be about 0.005 less
than the inside diameter of the bearing
FIG. C
Bevel
Nose Shoulder

MOUNTING LOADER
STEP 1 For a new loader installation, the mountings must be installed on the tractor first. Refer to the typical
mounting kit shown in Figure 1. A detailed schematic of your specific kit is available—just call 1-800-570-8205 if the
schematic was not included with your new loader.
STEP 2 The loader should have been dismounted (or assembled) on flat, level ground (see Figure 2).
FIG. 1
STEP 3 Approach the loader as shown in Figure 3 and connect the hydraulics.
STEP 4 Once the hydraulics are functional, begin to slowly tip the bucket forward from its flat position, see Figure
4A. This will bring the upright masts of the loader towards the support shafts on the mountings (Fig. 4B). Figure 4C
shows the mast completely seated on the support shaft. Once the mast is resting on the support shaft, the V-block
will also be aligned with the tapered guide block. The lift cylinders can be used to rotate the upright mast and firmly
seat the V-block against the guide block.
FIG. 2
FIG. 4A
FIG. 3
Support shaft
Upright mast
FIG. 4B
Tapered
Guide Block
V-Block
FIG. 4C
STEP 5 Using a 1-1/2” socket or end wrench, install and tighten the 1” retaining bolt that secures the V-block to
the guide block. See Figure 5.
STEP 6 Raise the bucket off the ground so that the stand legs are hanging free. See Figure 6.
Stand Legs Stand Legs Stored
FIG. 5 FIG. 6
FIG. 7
STEP 7 Return the stand legs to their stored position. See Figure 7.

DISMOUNTING LOADER
STEP 1 DRIVE THE TRACTOR ONTO FLAT CONCRETE and place the loader in the position shown in Fig 1.
STEP 2 Remove the stand legs from their stored position and place them in their dismount position. Slide the in-
ner tubes down to the extended position and secure them with the 3/4” pins. See Fig. 2.
FIG. 1
STEP 3 Gently lower the loader until the stand legs touch the ground. Please note that the stand legs are not de-
signed to withstand all of the down-force that can be generated with the lift cylinders, they are designed to support
the weight of the loader only. Rotate the bucket so that the cutting edge and stand legs are all resting on the
ground. See Fig. 3.
FIG. 4
STEP 4,5 Using a 1-1/2” socket or end wrench, remove the 1” retaining bolt that secures the V-block to the guide
block. See Figures 4,5.
STEP 6 Using the bucket cylinders, slowly flatten the bucket. This will start to lift the upright mast out of the pillar
mount, see Figure 6A. When the bucket is completely flat on the ground, the upright mast will be high enough to
back away from the loader. See Figure 6B
FIG. 5
FIG. 6A
STEP 7 Disconnect the hydraulic supply to the loader and slowly back away from the loader. See Figure 7.
FIG. 3
FIG. 2 Stand Legs
FIG. 7
FIG. 6B
Upright Mast
Pillar Mount

QUICK-ATTACH INSTRUCTIONS
UNCOUPLING
1. Raise sliding latches as shown in Figure 1.
2. Rotate QT pins out of the lower notches, raise, and then rotate them into the upper notches
of the sliding latches as shown in Figure 2.
3. Slide the sliding latches down as shown in Figure 3. This secures the QT pins in the “up”
position so they do not interfere when hooking up to the next attachment.
COUPLING
1. Approach and hook onto the attachment with QT pins secured in the “up” position as shown
in Figure 3.
2. When the QT frame is flat against the attachment, raise the sliding latches as shown in Fig-
ure 2.
3. Rotate QT pins out of the upper notches, lower, and then rotate them into the lower notches
on the sliding latches as shown in Figure 1. NOTE: If the QT pins do not easily slide thru the
lug on the attachment, do not force them. Simply rotate the attachment back and forth
slowly with the bucket cylinders of the loader and the QT pins should fall into place. Periodi-
cally grease the QT pins and sliding latches.
4. Secure the QT pins in the “down” position by sliding the latches down.

CYLINDER, BUCKET, GL/GP25
ITEM
NO. PART NUMBER DESCRIPTION Default/QTY.
2PN-600AC16 PIN, CHROME 2" x 6" WITH RETAINER 2
3PN-700AC16 PIN, CHROME 2" x 7" WITH RETAINER 2
4PN-650AC12 PIN, CHROME 1-1/2 x 6-1/2 WITH RETAINER 2
5PN-725AC12 PIN, CHROME 1-1/2 x 7-1/4 WITH RETAINER 2
6PN-11B12 REAR BUCKET CYLINDER PIN 2
7PN-4750-J12 LIFT CYLINDER PIN, 1-1/2 CHROME 2
8HW-LS-16-A LOCKWASHER, 1-IN., MED ZN 2
9HW-LS-08-A LOCKWASHER, 1/2, MED ZN 10
10 HW-NS-16-B NUT, 1-14 UNF, GR5, NZ 2
11 HW-NS-16-E NUT, 1-14 UNF GR8 TL, ZN 2
12 HW-NS-10-A NUT, 5/8-11 UNC GR8, ZN 1
13 HW-NS-08-A NUT, 1/2-13 UNC, ZN 10
16 LV01-04 SLIDE ROD ASSY, LEVEL INDICATOR 1
17 HW-BS-08-0200-A BOLT, 1/2-13 UNC, GR5 ZN, 2" LONG 8
18 HW-BS-10-0100-A BOLT, 5/8-11 UNC, GR5 ZN, 1" LONG 1
19 HW-BS-08-0150-A BOLT, 1/2-13 UNC, GR5 ZN, 1-1/2" LONG 1
20 HW-WS-08-A WASHER, 1/2" FLAT, ZN 3
21 MF25 MAINFRAME, GL25/GP25 1
22 QT25 QUICK ATTACH FRAME 1
29 LV01-01 SLIDE TUBE ASSY, LEVEL INDICATOR 1
30 LV01-03 LEVEL INDICATOR ROD, 5/8 x 48 1
31 UP25-AR UPRIGHT LEG, RIGHT 1
32 CY-062-L CYLINDER, GP25 LIFT, LH 1
33 CY-062-R CYLINDER, GP25 LIFT, RH 1
35 UP25-AL UPRIGHT LEG, LEFT 1
36 CY-063 2
DWG. NO.
SHEET
REV.
DATE
GP25 LOADER
OF
1
A
1/14/2005
GP25
1
SCHEMATIC
WEIGHT: 1766.443
GENERAL PART LIST
21
22
9
13
17
4
913 10
8
11
18
33
29
30
7
17 6
32
36
16
12
17 5
3
19
20
17
35
2

23
23
22
22
21
20
21 21 20
21
21
21
21
DWG. NO.
SHEET
REV.
DATE
MAINFRAME, GL25/GP25
BEARING & SEAL DETAIL
OF
1
A
1/27/2005
MF25
1
SCHEMATIC
WEIGHT: 928.756
ITEM
NO. PART NUMBER DESCRIPTION with bearings/QTY.
20 BR-2500K-3750 COMPOSITE BEARING, 2.00 BORE, 3.75 LONG 2
21 PS-2000-45 Pin Seal (MRW), 2.0 ID x 2.5 OD x 5/16 Thick 8
22 BR-2000K-1500 COMPOSITE BEARING, 1.50 BORE, 1.50 LONG 2
23 BR-2500K-3125 COMPOSITE BEARING, 2.00 BORE, 3.125 LONG 2

DWG. NO.
SHEET
REV.
DATE
QUICK ATTACH FRAME
OF
1
A
1/16/2005
QT25
1
SCHEMATIC
WEIGHT: 241.551
GL25/GP25
564
564
465
465
SLIDING LATCH DETAIL
1
2
ITEM
NO. PART NUMBER DESCRIPTION Pin Up Latch Up/QTY.
1 QT02-01L SLIDING LATCH ASSY, QT, LH 1
2 QT02-01R SLIDING LATCH ASSY, QT, RH 1
3 QT02-14 RETAINING PIN ASSEMBLY, QT 2
4 QT25-W WELDED QT FRAME, GL/GP25 1
ITEM
NO. PART NUMBER DESCRIPTION QTY.
4 HW-NS-06-A NUT, 3/8-16 UNC, CL, ZN 4
5 HW-SP-01 SPRING, QT HANDLE 4
6 HW-WS-06-A WASHER, 3/8, FLAT, ZN 4
4
1
3
2
3