I need a diagram to put rear shoes back on.

With any style of brake (drum or rotor), new shoes/pads will always be thicker than the ones you are replacing. You have to retract the brake cylinder pistons to get drums/calipers on. For drum brakes, squeeze the two shoes together at the brake cylinder. If there is no more play and it still won't go on, the shoes you are using are too thick - this can happen with certain aftermarket parts. Try the OEM shoes instead.

the rear brake shoes are very similar on most vehicles so any isuzu workshop manual will have diagrams and photos on the rear drum brakes
Tell your friend to leave the vehicle alone if he doesn't know what to do as it is your life he is messing with

Removal
1.Remove rear wheel and tire assembly from vehicle.

2.Remove rear brake drums from hub and bearing assemblies after loosening the two brake drum screws.

3.Be sure that the parking brake pedal is in the release(most upward) position.

4.Completely loosen square nut of the rear parking brake cable. Then create slack in the rear parking brake cables.

5.Remove adjuster spring from adjust lever and brake shoe.

6.Remove adjust lever and turn the adjusting wheel of adjuster assembly to the direction of the arrow as shown.

7.Remove the strut spring and the lower retracting spring from the brake shoe.

8.Remove the upper return spring from the brake shoe.

9.Remove brake back plate hold down spring and pin from the leading brake shoe assembly.

10.Remove the leading brake shoe. Then remove the adjuster assembly, strut and anchor spring from the trailing brake shoe.

11.Remove the trailing brake shoe from the brake back plate after removing hold down spring and pin.

12.Remove the trailing brake shoe from the rear parking cable.

13.Remove parking pivot lever from the leading brake shoe.

Replacement
1.Lubricate the eight shoe contact areas on the back plate and anchor.

2.Install the trailing brake shoe to the rear parking cable.

3.Install trailing brake shoe on brake back plate and install the trailing brake shoe hold down spring and pin on the brake shoe.

4.Tighten the square nut of rear parking cable.

5.Install the anchor spring then install adjuster assembly, and strut.

6.Install leading brake shoe on brake back plate.

7.Install the brake shoe upper return spring, strut spring and the lower retracting spring to the brake shoe.

8.Properly rotate the adjusting wheel of adjuster assembly to the direction of the arrow in as shown.

9.Install the adjuster spring on the adjust lever and leading brake shoe assembly.

10.Install the leading brake shoe hold down spring and pin on the brake shoe.

11.Adjust brake shoes assemblies so as not to interfere with brake drum installation.

12.Install the rear brake drums on the hubs.

13.Check and adjust whether the pedal stroke in the specification.(Refer to section BR Gr./On-vehicle service/Pedal stroke of parking brake)

14.Install wheel and tire.

15.Push the parking brake pedal to the floor once and release pedal. This will automatically remove the slack from and correctly adjust the parking brake cables.

16.Test the vehiche on the road. The adjust will continue the brake adjustment during the road test of vehicle.

Inspection
1.Inspect the disassembled parts for wear, rust or damage.

2.Measure the thickness of brake shoe lining.
Standard : 0.17 in (4.5 mm)
Minimum : 0.04 in (1 mm)

3.If the shoe lining is less than minimum or shows signs of uneven wear, replace new one.

4.Measure the inside diameter of the brake drum.
Standard : 10 in (254 mm)
Maximum : 10.07 in (256 mm)

5.If the inside diameter of the brake drum is more than maximum or shows signs of uneven wear, replace new one.

6.Inspect the lining and drum for proper contact. If the contact condition is improper, repair it with a grinder or replace the brake shoe assembly.

Let me know if this helps you any. Goodluck.

Hi, not sure if you will be able to get a diagram or not. If you are looking to do your brakes yourself, you can block up one side of the car and pull the brake drum off. Once the drum is off, you will be able to see all of the parts and how they go together. Then jack up the other side and replace the brake shoes. Use the blocked up side with drum removed as a reference when putting the other side back together, then switch sides. This is how I have done it before and it works really well...maybe better than a diagram.

autozone.com sign up its free then click on repair manuals you will find all of your info there....good luck

Go to any auto parts store and buy a Haynes Manual (Around 20 bucks) for your auto, it will have evything you want to know

It sounds like your self-adjusters are not assembled correctly allowing them to back off when braking.

FIRST JACK THE CAR UP THEN TO PROCEED TO TAKE OFF BOTH WHEELS IN THE REAR. CHECK BRAKE SHOES TO MAKE SURE THEY NEED REPLACEMENT. YOU WILL HAVE TO HAVE CERTAIN TOOLS TO REMOVE THE 2 SPRINGS OR YOU CAN USE PLIERS. IT'S EASY TO TALE OFF ONE SIDE OFF AT A TIME. THAT WAY IF YOU NEED TO CHECK THE ONE SIDE YOU JUST LOOK AND SEE IF YOU PUT ALL THE SPRINGS AND HARD PARTS BACK TOGETHER.

Pull both wheels off, do one at a time, use the other side as a guide to put it back together, I am a retired auto mechanic and this is the best way to do the job, also remember the larger shoe always goes to the back.